PainNCT01878877
Update Prevalence of Chronic Pain in Hong Kong
An observational study of Pain, run by The University of Hong Kong at 1 site in China.
Trial summary
Background Chronic pain is one of the major health problems among Western countries. It is also one of the most frequent reasons for seeking medical care. Chronic pain is also an important problem in Hong Kong. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Pain
- How many people
- 1,570 participants
- Where
- 1 siteChina
- Study dates
- May 2013to Jul 2013
- Phase
- Observational
- Are there results?
- None posted in the registry
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
- No healthy volunteers
- Adult, Older adult
Study population: The telephone interview will be conducted every weekday evening between 6pm and 9 pm by trained interviewers from Public Opinion Programme (POP) of the University of Hong Kong. Telephone number will be selected randomly from all households in Hong Kong.
Who may be able to join
- Only subjects aged 18 or above and speak Cantonese will be interviewed.
Who cannot join
- Refusal by the subjects
Trial locations and contacts
1 site in 1 country.
China1 site
Department of Anaesthesiology, the University of Hong Kong
Hong Kong
About this study
Official title: Update Prevalence of Chronic Pain Among Hong Kong Adult Population: Change Over the Last Decade
Background Chronic pain is one of the major health problems among Western countries. It is also one of the most frequent reasons for seeking medical care. Chronic pain is also an important problem in Hong Kong. A study conducted in our institution in 2002 discovered that the prevalence of chronic pain among Hong Kong adult population was 10.8%. This is expected to be higher after a decade as the population is aging because old age is one of the risk factors of chronic pain.
The changes in prevalence, pattern, severity and help seeking behavior should be explored in order to evaluate the attitude toward chronic pain and the efficacy of chronic pain treatment. A local study reported the prevalence of chronic pain in 2007 in Hong Kong was as high as 34.9%. The reported rate was much higher than that of Ng et al. However, the difference in methodology produced different results even though they were done in the same population, which make the comparison difficult. Besides, the treatment efficacy and help seeking behavior were not studied in this study. The differences in mode of data collection, the wording of the questionnaire and the grouping of categories also influence the results of the study. It is also desirable to have the update information of chronic pain in Hong Kong regularly (i.e. every 5 years) in view of the rapid increase in prevalence of chronic pain in Hong Kong.
To compare the changes in chronic pain prevalence and related outcomes, this study design is similar to the previous study done in our institution in 2002. The definition of chronic pain is the same as the previous study, which is pain persistence for 3 months or more. The mode of conducting the interview and the questionnaire used will be grossly similar to the previous study. Because chronic neuropathic pain is common and sometimes difficult to be managed, questions about the incidence of chronic neuropathic pain will also be sought. This important information has not been reported in Hong Kong before. The purpose of this study is to obtain the update cross-sectional prevalence and demographic information of chronic pain among Hong Kong adult population. The data will be compared with a similar study 4 done 10 years ago at our center in order to assess the change of chronic pain over the past decade. Treatment seeking preference will also be assessed. We hypothesize that the prevalence of chronic pain is increased when compare that of a decade ago.
Read the detailed description
Aims
- To determine the update prevalence, nature and intensity of chronic pain among Hong Kong population.
- To evaluate the help seeking behavior, the efficacy of treatment and the impact on daily function.
- To explore the change in chronic pain outcomes over the last decade by comparing a study conducted at the same center 10 years ago.
- To find out the incidence of neuropathic pain.
Methods:
After obtaining the approval from the Institutional Review Board of the University of Hong Kong/Hospital Authority Hong Kong West Cluster (HKU/HA HKW IRB), the study will be conducted according to a similar study conducted at Department of Anaesthesiology, the University of Hong Kong 10 years ago. The Cantonese version of the attached questionnaire will be administered over the telephone. The telephone interview will be conducted every weekday evening between 6pm and 9 pm by trained interviewers from Public Opinion Programme (POP) of the University of Hong Kong. Telephone number will be selected randomly from all households in Hong Kong. Verbal consent will be obtained. Only subjects aged 18 or above and speak Cantonese will be interviewed. Each interview will take about 15 minutes. Base on a 40% prevalence rate and a target 95% confidence interval of +/- 2.5%, 1500 successful interviews are required to complete this study 7.
Data Collection:
Demographic data; Location of pain; Type of pain present; Severity of pain; Duration of pain present; Impact on daily life; Pain treatment and efficacy; Incidence of neuropathic pain
Data Analysis:
Data collected will be analysed using the same method as previous study. Statistical software SAS version 6.12 (SAS Institute, Cary, NC, USA) will be used to perform the analysis. Parametric data will be presented as mean (SD) and non parametric data will be presented as median (range) or actual count or percentages. These results will then be compared with those from the previous study. Differences between groups will be compared using Mann-Whitney U or Kruskal-Wallis test, as appropriate.
Study duration: Total duration: 18 months Training of interviewers: 3 month Data collection: 6 months Data analysis: 3 months Research conclusion and report generation: 3 months
Existing facilities Information and questionnaire of the study had been sent to POP (A investigating center at the Unviersity of Hong Kong helping for the telephone interview) for comment. POP has agreed to participate in this study. Recruitment and training of interviewers will be provided by POP. The phone interviews will be done and monitored by POP.
We have the computer system and software to analyze the data and for recording. Professional statistician is available to perform the analysis. Research assistant will be recruited to help for conducting this study and data analysis.
Justification of requirements:
Our institute had completed the previous study on chronic pain prevalence successfully and we are experienced in conducting this type of study. The POP of the University of Hong Kong is experienced in conducting similar survey and questionnaire interviews. They have the manpower and training for the interview of this study. The questionnaire will be delivered by trained interviewers from their department. An experienced research assistant is mandatory in analysis of the data by comparing the change of outcomes in two time points, drafting the reports, coordinating the study, following up the program, retrieving data in 2002, which can give valuable information on the change.
Potential hazards:
Personal/ sensitive information will not be asked and the data will be kept in password guarded computer. The interviewees can withdraw from the study or refuse to answer any question during the telephone interview. The interviewees will not be exposed to any additional risk.
Purpose and potential for implementation of results:
The purpose of this study is to obtain detailed information of chronic pain in Hong Kong. The pattern, locations, nature and severity of chronic pain will be studied.
The data obtained will also be used to evaluate the efficiency of current treatments in chronic pain in Hong Kong. The help seeking preference will be explored to provide information for planning and allocation of resources. All the information is important in improving the pain management service in Hong Kong. The awareness of chronic pain can also be promoted and enhanced.
Consent: Verbal consent will be obtained.
- Conditions
- Pain
- Keywords
- Chronic pain, neuropathic pain
- Medical subject headings
- Pain, Chronic Pain, Neuralgia
What is being measured
The primary outcome is the main question the study is designed to answer.
Prevalence of chronic pain
Measured: The participants will be asked for the incidence of chronic pain during the telephone interview. We will assess the chronic pain up to 1 year since it has stared.
Secondary outcomes (1)
Incidence of neuropathic pain
Measured: The participants will be asked for the incidence of chronic pain during the telephone interview. We will assess the chronic pain up to 1 year since it has stared.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted17 Jun 2013 (estimated)
- Study startMay 2013
- Primary completionJul 2013
- Study completionJul 2013
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for PainStudies of the same condition, open and under way.
- More trials run by The University of Hong KongThe sponsor's other registered studies.
- 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
- Ecologic or community
- Time perspective
- Cross-sectional
- Enrolment
- 1,570 participants (actual)
Sponsor and investigators
- Lead sponsor
- The University of Hong Kong
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Cheung Chi Wai, The University of Hong Kong
- Investigators
- Chi Wai Cheung, MBBS, MD, Principal investigator, Department of Anaesthesiology, the University of Hong Kong
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01878877
- Sponsor's protocol ID
- UW 13-140
- Status last verified
- Sep 2013
- First submitted
- 1 Apr 2013
- Last updated
- 17 Sep 2013
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 17 Sep 2013. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Update Prevalence of Chronic Pain Among Hong Kong Adult Population: Change Over the Last Decade
- ClinicalTrials.gov ID
- NCT01878877
- Acronym / sponsor ID
- UW 13-140
- Conditions
- Pain
- Keywords
- Chronic pain, neuropathic pain
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 1,570 participants (actual)
- Lead sponsor
- The University of Hong KongUniversity, hospital or other
- Study start
- May 2013
- Primary completion
- Jul 2013 (actual)
- Study completion
- Jul 2013 (actual)
- First posted
- 17 Jun 2013 (estimated)
- 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.
Background Chronic pain is one of the major health problems among Western countries. It is also one of the most frequent reasons for seeking medical care. Chronic pain is also an important problem in Hong Kong. A study conducted in our institution in 2002 discovered that the prevalence of chronic pain among Hong Kong adult population was 10.8%. This is expected to be higher after a decade as the population is aging because old age is one of the risk factors of chronic pain.
The changes in prevalence, pattern, severity and help seeking behavior should be explored in order to evaluate the attitude toward chronic pain and the efficacy of chronic pain treatment. A local study reported the prevalence of chronic pain in 2007 in Hong Kong was as high as 34.9%. The reported rate was much higher than that of Ng et al. However, the difference in methodology produced different results even though they were done in the same population, which make the comparison difficult. Besides, the treatment efficacy and help seeking behavior were not studied in this study. The differences in mode of data collection, the wording of the questionnaire and the grouping of categories also influence the results of the study. It is also desirable to have the update information of chronic pain in Hong Kong regularly (i.e. every 5 years) in view of the rapid increase in prevalence of chronic pain in Hong Kong.
To compare the changes in chronic pain prevalence and related outcomes, this study design is similar to the previous study done in our institution in 2002. The definition of chronic pain is the same as the previous study, which is pain persistence for 3 months or more. The mode of conducting the interview and the questionnaire used will be grossly similar to the previous study. Because chronic neuropathic pain is common and sometimes difficult to be managed, questions about the incidence of chronic neuropathic pain will also be sought. This important information has not been reported in Hong Kong before. The purpose of this study is to obtain the update cross-sectional prevalence and demographic information of chronic pain among Hong Kong adult population. The data will be compared with a similar study 4 done 10 years ago at our center in order to assess the change of chronic pain over the past decade. Treatment seeking preference will also be assessed. We hypothesize that the prevalence of chronic pain is increased when compare that of a decade ago.
Detailed description
Aims
- To determine the update prevalence, nature and intensity of chronic pain among Hong Kong population.
- To evaluate the help seeking behavior, the efficacy of treatment and the impact on daily function.
- To explore the change in chronic pain outcomes over the last decade by comparing a study conducted at the same center 10 years ago.
- To find out the incidence of neuropathic pain.
Methods:
After obtaining the approval from the Institutional Review Board of the University of Hong Kong/Hospital Authority Hong Kong West Cluster (HKU/HA HKW IRB), the study will be conducted according to a similar study conducted at Department of Anaesthesiology, the University of Hong Kong 10 years ago. The Cantonese version of the attached questionnaire will be administered over the telephone. The telephone interview will be conducted every weekday evening between 6pm and 9 pm by trained interviewers from Public Opinion Programme (POP) of the University of Hong Kong. Telephone number will be selected randomly from all households in Hong Kong. Verbal consent will be obtained. Only subjects aged 18 or above and speak Cantonese will be interviewed. Each interview will take about 15 minutes. Base on a 40% prevalence rate and a target 95% confidence interval of +/- 2.5%, 1500 successful interviews are required to complete this study 7.
Data Collection:
Demographic data; Location of pain; Type of pain present; Severity of pain; Duration of pain present; Impact on daily life; Pain treatment and efficacy; Incidence of neuropathic pain
Data Analysis:
Data collected will be analysed using the same method as previous study. Statistical software SAS version 6.12 (SAS Institute, Cary, NC, USA) will be used to perform the analysis. Parametric data will be presented as mean (SD) and non parametric data will be presented as median (range) or actual count or percentages. These results will then be compared with those from the previous study. Differences between groups will be compared using Mann-Whitney U or Kruskal-Wallis test, as appropriate.
Study duration: Total duration: 18 months Training of interviewers: 3 month Data collection: 6 months Data analysis: 3 months Research conclusion and report generation: 3 months
Existing facilities Information and questionnaire of the study had been sent to POP (A investigating center at the Unviersity of Hong Kong helping for the telephone interview) for comment. POP has agreed to participate in this study. Recruitment and training of interviewers will be provided by POP. The phone interviews will be done and monitored by POP.
We have the computer system and software to analyze the data and for recording. Professional statistician is available to perform the analysis. Research assistant will be recruited to help for conducting this study and data analysis.
Justification of requirements:
Our institute had completed the previous study on chronic pain prevalence successfully and we are experienced in conducting this type of study. The POP of the University of Hong Kong is experienced in conducting similar survey and questionnaire interviews. They have the manpower and training for the interview of this study. The questionnaire will be delivered by trained interviewers from their department. An experienced research assistant is mandatory in analysis of the data by comparing the change of outcomes in two time points, drafting the reports, coordinating the study, following up the program, retrieving data in 2002, which can give valuable information on the change.
Potential hazards:
Personal/ sensitive information will not be asked and the data will be kept in password guarded computer. The interviewees can withdraw from the study or refuse to answer any question during the telephone interview. The interviewees will not be exposed to any additional risk.
Purpose and potential for implementation of results:
The purpose of this study is to obtain detailed information of chronic pain in Hong Kong. The pattern, locations, nature and severity of chronic pain will be studied.
The data obtained will also be used to evaluate the efficiency of current treatments in chronic pain in Hong Kong. The help seeking preference will be explored to provide information for planning and allocation of resources. All the information is important in improving the pain management service in Hong Kong. The awareness of chronic pain can also be promoted and enhanced.
Consent: Verbal consent will be obtained.
Study design
- Observational model
- Ecologic or community
- Time perspective
- Cross-sectional
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- The telephone interview will be conducted every weekday evening between 6pm and 9 pm by trained interviewers from Public Opinion Programme (POP) of the University of Hong Kong. Telephone number will be selected randomly from all households in Hong Kong.
Key inclusion criteria (1 listed)
- Only subjects aged 18 or above and speak Cantonese will be interviewed.
Key exclusion criteria (1 listed)
- Refusal by the subjects
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Prevalence of chronic pain
Time frame: The participants will be asked for the incidence of chronic pain during the telephone interview. We will assess the chronic pain up to 1 year since it has stared.
1 secondary outcome
Incidence of neuropathic pain
Time frame: The participants will be asked for the incidence of chronic pain during the telephone interview. We will assess the chronic pain up to 1 year since it has stared.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 17 Sep 2013.
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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.
Chi Wai Cheung, MBBS, MD principal investigator
Department of Anaesthesiology, the University of Hong Kong
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 Pain, run by The University of Hong Kong at 1 site in China.
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 1 inclusion and 1 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: finished, as of the sponsor's last update on 17 Sep 2013. 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 China. 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?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
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?
Prevalence of chronic pain (time frame: The participants will be asked for the incidence of chronic pain during the telephone interview. We will assess the chronic pain up to 1 year since it has stared.). 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 17 Sep 2013.