Quality of LifeTRUSTNCT03741582
Urban Transformations and Health: the Case of TransMiCable in Bogotá
An observational study of Quality of Life and Social Capital, run by University of Los Andes, Columbia at 1 site in Colombia.
Trial summary
Cable cars are means of transportation with urban mobility benefits for vulnerable populations living in areas with geographic barriers. Despite their popularity, there is no evidence of cable cars' potential health effects. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Quality of Life, Social Capital, Transportation
- What is being tested?
- TransMiCable
- How many people
- 2,052 participants
- Where
- 1 siteColombia
- Study dates
- 15 Feb 2018to 1 Jun 2025
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: Every participant of the study is an adult that lives on one of the 225 blocks selected from each buffer with probability proportional to the size of the catchment areas' population. For selecting the participant, 4 or 5 households were systematically selected on each block. The families of each household were selected with a random numbers chart, as well as the participant listing every adult by age.
Who may be able to join
- Has minimum 18 years old
- Has lived over the past 2 years in the study area
- Would not move from the study area in the next 2 years
- Has not any kind of cognitive problem
Who cannot join
- Has less than 18 years old
- Has not lived over the past 2 years in the study area
- Has plans to move from the study area in the next 2 years
- Has any kind of cognitive problem
Trial locations and contacts
1 site in 1 country.
About this study
Cable cars are means of transportation with urban mobility benefits for vulnerable populations living in areas with geographic barriers. Despite their popularity, there is no evidence of cable cars' potential health effects. TransMicable, located in "Ciudad Bolivar", Bogota, Colombia will open in late-2018 presenting an unprecedented opportunity to assess the health impacts and accessibility improvements. The investigators aim is to assess the effect of theTransMiCable implementation on social determinants of health (social capital, employment, crime, transport, microenvironment pollution, built environment), healthy behaviors (leisure and transport physical activity) and health outcomes (health-related quality of life, respiratory diseases and homicides).
The investigators are conducting a controlled quasi-experimental pre-post study with six elements: 1) The co-construction of a conceptual framework using a causal loop diagram with stakeholders of multiple sectors. 2) A (non-intervention - intervention) quantitative study of social capital, community participation, travel time, costs, demand, modal choice, physical activity and health-related quality of life using repeated in-person questionnaire, anthropometric measurements and physical activity using accelerometers. 3) A transport trajectory study in a subsample of the population of the quantitative study using a mobile application to track journeys. 4) A subsample of environment evaluations 5) Our Voice in the Neighborhood qualitative study to address the potential change in perceptions of the neighborhood using Citizen Science "by the people" involving the community and local public and private stakeholders and 6) A Secondary-data analysis of Crime and Respiratory diseases using time trends from official surveillance systems for homicides and acute respiratory diseases.
The investigators' main hypothesis are 1) There is an increase in the Social Capital and Quality of life indicators in the TransMicable target area after the implementation when compared to other neighborhoods without TransMiCable. 2) There is a significant decrease in travel time and cost for trips to downtown Bogota and an increase in the total number of trips for residents of "Ciudad Bolivar" neighborhoods with TransMiCable, after the implementation of TransMiCable when compared to other neighborhoods without TransMiCable in the locality of "San Cristobal". 3) There is a significant shift in modal choice for the resident of "Ciudad Bolivar" from informal transport service to the TransMiCable system with a positive association in terms of proximity to TransMiCable stations. 4) Most TransMiCable users are former informal bus transit and formal bus feeder users. While most users will access TransMiCable by walking, some living further from stations will take informal transport services to access to TransMiCable. 5) There is a reduction in the microenvironment pollution around the target area of TransMiCable when compared to the control area. 6) There is a change in the perception of the neighborhood for residents of the target area of TransMiCable when compared to the control area. 7) There is a significant decrease in the prevalence of homicides and acute respiratory diseases in the area of the TransMiCable implementation in comparison to the control area without TransMiCable. The results of this study will allow us to understand baseline dynamics, while, in the long-term, allowing us to assess the changes in travel and health behaviors.
- Conditions
- Quality of Life, Social Capital, Transportation, Physical Activity, Homicide, Respiratory Disease
- Being tested
- TransMiCable
- Keywords
- Transportation, Urban Health, Quality of Life, Social Capital, Crime, Respiratory Diseases
- Medical subject headings
- Motor Activity, Respiration Disorders, Respiratory Tract Diseases
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
TransMiCableOther
TransMiCable will have one service line 3.43 km-long with four stations ("El Tunal" , "Juan Pablo II" , "Manitas" , and "Paraiso", see highlighted stops in Figure 2). "El Tunal" is the station that connects to the city's bus rapid transit system. The planned capacity of TransMiCable is 3,600 persons per hour in 163 cabins or gondolas. Each cabin fits ten passengers, with space for wheelchairs and bicycles and will be equipped with free Wi-Fi. The expected travel time reductions from each station to portal "El Tunal", through the shortest pathway, are: 26 minutes saved from "Juan Pablo II" station-from 32 to 6 minutes; 31 minutes saved from "Manitas" station-from 38 to 7 minutes and 49 minutes saved from "Paraiso" station-from 62 to 13 minutes 22. In conjunction with TransMiCable, urban projects will be implemented including the construction of parks, outdoor gyms, sport courts, community centers for children and older adults, a market, an administrative, and a tourism offices.
| Study group | Role | What they receive |
|---|---|---|
| Control - San Cristobal | 1021 individuals located in an area with no access to the intervention (TransMicable). The control area was defined by a 800-meter buffer around each projected station of the car, "San Cristobal" was an area with a projected but non financed Cable Car. | |
| Intervention - Ciudad Bolviar | 1031 individuals who live in the area of influence of TransMiCable. The area of influence of TransMiCable was defined by a 800-meter radial buffer around each station of the cable car. Receives: Other: TransMiCable |
What is being measured
The primary outcome is the main question the study is designed to answer.
Basic activity monitoring
An Actigraph activity monitor is given to every participant of the study for wearing it over seven days. The reception of the monitors by the participants was prioritized in the intervention group over the control, due to the limited amount of monitors. Participants are asked to wear an ActiGraph "GT3X" or "GT3X+" accelerometer at the waist, and positioned in line with the right mid-axillary line, for at least seven consecutive days (plus an initial familiarization day and the morning of the final day) during all waking hours. Accelerometers are initialized to collect data at 60-second epochs. Participants who successfully complete the use of the monitor are included on a raffle for an special prize at the end of every measurement. In every follow-up participants will be asked to repeat the activity monitoring along with the questionnaire.
Measured: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Trajectory measurement
We recorded the trajectories of a subset of participants using a global positioning system (GPS) mobile application. For the first measurement, the mobile phone application Moves was installed in participants' Smart-phones to automatically record an activity diary. The application remains installed for at least seven consecutive days (plus an initial familiarization day and the morning of the final day). Data produced by the mobile application include geo-location of places visited, departures and arrival times for each place, transportation modes used classified as walking, cycling, running, and motorized transport, and depending on the Smart-phone, routes employed to access to each destination with geo-located checkpoints. Since Moves servers shut down on july 31, for the follow-up measurements will use another GPS trajectory mobile application.
Measured: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Longitudinal qualitative interviews
Our Voice in the Neighborhood qualitative study to address the potential change in perceptions of the neighborhood using Citizen Science "by the people" involving the community and local public and private stakeholders.
Measured: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Questionnaire survey Transport section
Characterization of the use of public transport measured with questions taken from the Mobility Survey of Bogotá.
Measured: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Questionnaire survey IPAQ section
Leisure-time physical activity spent time during a week measured with the International Physical Activity Questionnaire (IPAQ) in its long version.
Measured: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Questionnaire survey Quality of life section
Quality of life and wellbeing measured with the World Health Organization Quality Of Life instrument (WHOQOL-bref instrument). The instrument produces a quality of life profile with a 26-item questionnaire divided in four domains: domains: physical health, psychological, social relationships and environment. It is possible to derive a score for each one of them, which denotes the individual perception of the quality of life in each component. The score goes from 0 and increases positively until 5 for each question being 5 the best outcome possible. The mean score of each domain is used for calculating the average score, and then multiplied by 4 for making the scores comparable with WHOQOL-100 (long version of the questionnaire).
Measured: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Questionnaire survey Social capital section
Social Capital measured by an adapted questionnaire based on: The World Bank (SC-IQ), The Development Bank of Latin America - CAF survey, and Encuesta Multipropósito.
Measured: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Questionnaire survey Respiratory diseases section
Identification of acute and chronic respiratory diseases in all the infants and elders in a household measured with a module of "less than 5" and "more than 65 years old"
Measured: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Questionnaire survey loneliness section
Loneliness of the participant measured with the University of California, los Angeles (UCLA) Scale of Loneliness.
Measured: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Questionnaire survey Use of free time section
An inventory of activities during free time, the time participants spend going to health, educational and recreational services, and whether during the last 12 months participants attended to preventive health services.
Measured: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Environment evaluations SOPARC
Observed levels of physical activity in the parks and recreation centers using System for Observing Play and Recreation in Communities (SOPARC).
Measured: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Environment evaluations Air pollution
personal exposure in transport microenvironments to fine particulate matter (PM2.5), equivalent black carbon (eBC), Carbon Monoxide (CO) and number of sub-micron particles (Np) using aerosol monitors, aethalometers and photoradiometers while keeping records of their time and activity while in the microenvironments.
Measured: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Crime measurements
A Secondary-data analysis of Crime using time trends from official surveillance systems for homicides.
Measured: This measurements are performed by different official systems and were collected by the end of each year.
Respiratory diseases measurements
A Secondary-data analysis of Respiratory diseases using time trends from official surveillance systems for acute respiratory diseases.
Measured: This measurements are performed by different official systems and were collected by the end of each year.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted15 Nov 2018
- Study start15 Feb 2018
- Primary completion5 Aug 2023
- Study completion1 Jun 2025 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Quality of LifeStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Other
- Time perspective
- Prospective
- Enrolment
- 2,052 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Los Andes, Columbia
- Sponsor type
- University, hospital or other
- Collaborators
- Wellcome Trust, Drexel University, Fundación Santa Fe de Bogota
- Responsible party
- Principal investigator, Olga Lucia Sarmiento, University of Los Andes, Columbia
- Investigators
- Olga L Sarmiento, Principal investigator, Universidad de los Andes, Colombia
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03741582
- Sponsor's protocol ID
- 806-2017
- Acronym
- TRUST
- Status last verified
- Dec 2024
- First submitted
- 19 Oct 2018
- Last updated
- 9 Dec 2024
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Study at a glance
From the registry record, last updated by the sponsor on 9 Dec 2024. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Urban Transformations and Health: the Case of TransMiCable in Bogotá
- ClinicalTrials.gov ID
- NCT03741582
- Acronym / sponsor ID
- TRUST / 806-2017
- Conditions
- Quality of Life, Social Capital, Transportation, Physical Activity, Homicide, Respiratory Disease
- Keywords
- Transportation, Urban Health, Quality of Life, Social Capital, Crime, Respiratory Diseases
- Study type
- Observational
- Recruitment status
- Active, not recruiting
- Enrolment
- 2,052 participants (actual)
- Lead sponsor
- University of Los Andes, ColumbiaUniversity, hospital or other
- Collaborators
- Wellcome Trust, Drexel University, Fundación Santa Fe de Bogota
- Study start
- 15 Feb 2018 (actual)
- Primary completion
- 5 Aug 2023 (actual)
- Study completion
- 1 Jun 2025 (estimated)
- First posted
- 15 Nov 2018 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Cable cars are means of transportation with urban mobility benefits for vulnerable populations living in areas with geographic barriers. Despite their popularity, there is no evidence of cable cars' potential health effects. TransMicable, located in "Ciudad Bolivar", Bogota, Colombia will open in late-2018 presenting an unprecedented opportunity to assess the health impacts and accessibility improvements. The investigators aim is to assess the effect of theTransMiCable implementation on social determinants of health (social capital, employment, crime, transport, microenvironment pollution, built environment), healthy behaviors (leisure and transport physical activity) and health outcomes (health-related quality of life, respiratory diseases and homicides).
The investigators are conducting a controlled quasi-experimental pre-post study with six elements: 1) The co-construction of a conceptual framework using a causal loop diagram with stakeholders of multiple sectors. 2) A (non-intervention - intervention) quantitative study of social capital, community participation, travel time, costs, demand, modal choice, physical activity and health-related quality of life using repeated in-person questionnaire, anthropometric measurements and physical activity using accelerometers. 3) A transport trajectory study in a subsample of the population of the quantitative study using a mobile application to track journeys. 4) A subsample of environment evaluations 5) Our Voice in the Neighborhood qualitative study to address the potential change in perceptions of the neighborhood using Citizen Science "by the people" involving the community and local public and private stakeholders and 6) A Secondary-data analysis of Crime and Respiratory diseases using time trends from official surveillance systems for homicides and acute respiratory diseases.
The investigators' main hypothesis are 1) There is an increase in the Social Capital and Quality of life indicators in the TransMicable target area after the implementation when compared to other neighborhoods without TransMiCable. 2) There is a significant decrease in travel time and cost for trips to downtown Bogota and an increase in the total number of trips for residents of "Ciudad Bolivar" neighborhoods with TransMiCable, after the implementation of TransMiCable when compared to other neighborhoods without TransMiCable in the locality of "San Cristobal". 3) There is a significant shift in modal choice for the resident of "Ciudad Bolivar" from informal transport service to the TransMiCable system with a positive association in terms of proximity to TransMiCable stations. 4) Most TransMiCable users are former informal bus transit and formal bus feeder users. While most users will access TransMiCable by walking, some living further from stations will take informal transport services to access to TransMiCable. 5) There is a reduction in the microenvironment pollution around the target area of TransMiCable when compared to the control area. 6) There is a change in the perception of the neighborhood for residents of the target area of TransMiCable when compared to the control area. 7) There is a significant decrease in the prevalence of homicides and acute respiratory diseases in the area of the TransMiCable implementation in comparison to the control area without TransMiCable. The results of this study will allow us to understand baseline dynamics, while, in the long-term, allowing us to assess the changes in travel and health behaviors.
Study design
- Observational model
- Other
- Time perspective
- Prospective
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Control - San Cristobal | – | –1021 individuals located in an area with no access to the intervention (TransMicable). The control area was defined by a 800-meter buffer around each projected station of the car, "San Cristobal" was an area with a projected but non financed Cable Car. |
| Intervention - Ciudad Bolviar | – | Other: TransMiCable1031 individuals who live in the area of influence of TransMiCable. The area of influence of TransMiCable was defined by a 800-meter radial buffer around each station of the cable car. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Every participant of the study is an adult that lives on one of the 225 blocks selected from each buffer with probability proportional to the size of the catchment areas' population. For selecting the participant, 4 or 5 households were systematically selected on each block. The families of each household were selected with a random numbers chart, as well as the participant listing every adult by age.
Key inclusion criteria (4 listed)
- Has minimum 18 years old
- Has lived over the past 2 years in the study area
- Would not move from the study area in the next 2 years
- Has not any kind of cognitive problem
Key exclusion criteria (4 listed)
- Has less than 18 years old
- Has not lived over the past 2 years in the study area
- Has plans to move from the study area in the next 2 years
- Has any kind of cognitive problem
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| TransMiCableTransMiCable will have one service line 3.43 km-long with four stations ("El Tunal" , "Juan Pablo II" , "Manitas" , and "Paraiso", see highlighted stops in Figure 2). "El Tunal" is the station that connects to the city's bus rapid transit system. The planned capacity of TransMiCable is 3,600 persons per hour in 163 cabins or gondolas. Each cabin fits ten passengers, with space for wheelchairs and bicycles and will be equipped with free Wi-Fi. The expected travel time reductions from each station to portal "El Tunal", through the shortest pathway, are: 26 minutes saved from "Juan Pablo II" station-from 32 to 6 minutes; 31 minutes saved from "Manitas" station-from 38 to 7 minutes and 49 minutes saved from "Paraiso" station-from 62 to 13 minutes 22. In conjunction with TransMiCable, urban projects will be implemented including the construction of parks, outdoor gyms, sport courts, community centers for children and older adults, a market, an administrative, and a tourism offices. | Other | Intervention - Ciudad Bolviar |
Primary outcome
Basic activity monitoring
Time frame: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
An Actigraph activity monitor is given to every participant of the study for wearing it over seven days. The reception of the monitors by the participants was prioritized in the intervention group over the control, due to the limited amount of monitors. Participants are asked to wear an ActiGraph "GT3X" or "GT3X+" accelerometer at the waist, and positioned in line with the right mid-axillary line, for at least seven consecutive days (plus an initial familiarization day and the morning of the final day) during all waking hours. Accelerometers are initialized to collect data at 60-second epochs. Participants who successfully complete the use of the monitor are included on a raffle for an special prize at the end of every measurement. In every follow-up participants will be asked to repeat the activity monitoring along with the questionnaire.
Trajectory measurement
Time frame: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
We recorded the trajectories of a subset of participants using a global positioning system (GPS) mobile application. For the first measurement, the mobile phone application Moves was installed in participants' Smart-phones to automatically record an activity diary. The application remains installed for at least seven consecutive days (plus an initial familiarization day and the morning of the final day). Data produced by the mobile application include geo-location of places visited, departures and arrival times for each place, transportation modes used classified as walking, cycling, running, and motorized transport, and depending on the Smart-phone, routes employed to access to each destination with geo-located checkpoints. Since Moves servers shut down on july 31, for the follow-up measurements will use another GPS trajectory mobile application.
Longitudinal qualitative interviews
Time frame: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Our Voice in the Neighborhood qualitative study to address the potential change in perceptions of the neighborhood using Citizen Science "by the people" involving the community and local public and private stakeholders.
Questionnaire survey Transport section
Time frame: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Characterization of the use of public transport measured with questions taken from the Mobility Survey of Bogotá.
Questionnaire survey IPAQ section
Time frame: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Leisure-time physical activity spent time during a week measured with the International Physical Activity Questionnaire (IPAQ) in its long version.
Questionnaire survey Quality of life section
Time frame: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Quality of life and wellbeing measured with the World Health Organization Quality Of Life instrument (WHOQOL-bref instrument). The instrument produces a quality of life profile with a 26-item questionnaire divided in four domains: domains: physical health, psychological, social relationships and environment. It is possible to derive a score for each one of them, which denotes the individual perception of the quality of life in each component. The score goes from 0 and increases positively until 5 for each question being 5 the best outcome possible. The mean score of each domain is used for calculating the average score, and then multiplied by 4 for making the scores comparable with WHOQOL-100 (long version of the questionnaire).
Questionnaire survey Social capital section
Time frame: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Social Capital measured by an adapted questionnaire based on: The World Bank (SC-IQ), The Development Bank of Latin America - CAF survey, and Encuesta Multipropósito.
Questionnaire survey Respiratory diseases section
Time frame: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Identification of acute and chronic respiratory diseases in all the infants and elders in a household measured with a module of "less than 5" and "more than 65 years old"
Questionnaire survey loneliness section
Time frame: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Loneliness of the participant measured with the University of California, los Angeles (UCLA) Scale of Loneliness.
Questionnaire survey Use of free time section
Time frame: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
An inventory of activities during free time, the time participants spend going to health, educational and recreational services, and whether during the last 12 months participants attended to preventive health services.
Environment evaluations SOPARC
Time frame: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
Observed levels of physical activity in the parks and recreation centers using System for Observing Play and Recreation in Communities (SOPARC).
Environment evaluations Air pollution
Time frame: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023
personal exposure in transport microenvironments to fine particulate matter (PM2.5), equivalent black carbon (eBC), Carbon Monoxide (CO) and number of sub-micron particles (Np) using aerosol monitors, aethalometers and photoradiometers while keeping records of their time and activity while in the microenvironments.
Crime measurements
Time frame: This measurements are performed by different official systems and were collected by the end of each year.
A Secondary-data analysis of Crime using time trends from official surveillance systems for homicides.
Respiratory diseases measurements
Time frame: This measurements are performed by different official systems and were collected by the end of each year.
A Secondary-data analysis of Respiratory diseases using time trends from official surveillance systems for acute respiratory diseases.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 9 Dec 2024.
- Individual participant dataSharing planned: Undecided
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Olga L Sarmiento principal investigator
Universidad de los Andes, Colombia
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Quality of Life and Social Capital, run by University of Los Andes, Columbia at 1 site in Colombia.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: under way, not looking for participants, as of the sponsor's last update on 9 Dec 2024. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Colombia. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Basic activity monitoring (time frame: First measurement: February to December 2018, Second measurement: July 2019 to March 2020, Third measurement: March to Sep 2021, Fourth measurement: August 2022 to May 2023). The study lists 14 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 9 Dec 2024.