Ocular HypertensionPhase 3OHTSNCT00000125
Ocular Hypertension Treatment Study (OHTS)
A Phase 3 study testing Topical ocular hypotensive eye drops. in people with Ocular Hypertension and Glaucoma, run by Washington University School of Medicine.
Trial summary
To determine whether medical reduction of intraocular pressure prevents or delays the onset of glaucomatous visual field loss and/or optic disc damage in ocular hypertensive participants judged to be at moderate risk for developing open-angle glaucoma. Read more about this study
- Who is it for?
- Ages 40 to 80 years
- Conditions the study is for
- Ocular Hypertension, Glaucoma
- What is being tested?
- Topical ocular hypotensive eye drops.
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 1,636 participants
- Where
- No sites listed yet
- Study dates
- Feb 1994to 30 Jun 2019
- Phase
- Phase 3
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
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 40 to 80 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Men and nonpregnant women between the ages of 40 and 80 with IOP greater than or equal to 24 mm Hg but less than or equal to 32 mm Hg in at least one eye and IOP greater than or equal to 21 but less than or equal to 32 mm Hg in the fellow eye, as well as normal visual fields and optic discs are eligible for the trial. Patients presenting with best-corrected visual acuity worse than 20/40 in either eye, previous intraocular surgery, a life-threatening or debilitating disease, secondary causes of elevated IOP, angle-closure glaucoma or anatomically narrow angles, other diseases that can cause visual field loss, background diabetic retinopathy, optic disc abnormalities that can produce visual field loss or obscure the interpretation of the optic disc, or unwillingness to undergo random assignment are excluded from the trial.
About this study
To determine whether medical reduction of intraocular pressure prevents or delays the onset of glaucomatous visual field loss and/or optic disc damage in ocular hypertensive participants judged to be at moderate risk for developing open-angle glaucoma.
To produce natural history data to assist in identifying patients at most risk for developing open-angle glaucoma and those most likely to benefit from early medical treatment.
To quantify risk factors for developing open-angle glaucoma among ocular hypertensive individuals.
Read the detailed description
OHTS Phase 3 will re-examine study participants 20 plus years after enrollment to document clinical status and the incidence and severity of self-reported functional limitations. The 279 participants who developed POAG in OHTS Phase 1 or 2 will have more than 10 years of post-POAG follow-up by Phase 3. The timing of re-examination at 20 years is meaningful because 20 years approaches the median life expectancy of OHT patients in their 60's and 70's and half the median life expectancy of patients in their 40's and 50's. For the first time, patients with ocular hypertension and clinicians will have high quality data about the long-term risk of developing POAG and functional limitations associated with the disease. These data will facilitate patient-centered care so that patients and clinicians can decide on the appropriate frequency of tests and examinations and the potential benefit of preventative treatment.
Glaucoma is one of the leading causes of blindness in the United States and other industrialized countries. It is estimated that 2 million people in the United States have glaucoma and that 80,000 of these individuals are legally blind from the disease. Among African Americans, glaucoma is now recognized as the leading cause of blindness.
Elevated intraocular pressure (IOP), a common condition affecting 3 to 6 million people in the United States, is thought to be the leading risk factor for development of open-angle glaucoma. There is no consensus that medical reduction of intraocular pressure prevents or delays the onset of visual field and/or optic nerve damage in ocular hypertensive subjects.
Despite the lack of convincing evidence for the efficacy of medical treatment in ocular hypertension, approximately 1.5 million glaucoma suspects in the United States are being treated with costly ocular hypotensive medications that carry the potential for serious and even life-threatening side effects.
Clearly, there is a need for a well-controlled clinical trial to determine whether medical reduction of IOP can prevent or delay the onset of glaucomatous damage in ocular hypertensive subjects. Only then can clinicians and patients make rational choices and health care planners ensure that limited medical resources are being allocated in a safe and cost-effective manner.
The Ocular Hypertension Treatment Study (OHTS) is a long-term, randomized, controlled multicenter clinical trial. Ocular hypertensive subjects judged to be at moderate risk of developing primary open-angle glaucoma are randomly assigned to either close observation only or a stepped medical regimen. Medical treatment consists of all commercially available topical ocular hypotensive eye drops.
After completion of baseline measures (IOP, visual fields, disc photos) and randomization, the subjects are followed for a minimum of 5 years with automated threshold central static perimetry (Humphrey program 30-2) twice yearly and stereoscopic optic disc photographs once yearly. Study end points are reproducible visual field loss and/or progressive optic disc damage in either eye of a patient attributed to glaucoma by a Masked Endpoint Committee. All visual fields and optic disc photographs are read in a masked fashion in Reading Centers.
In the 1991 Baltimore Eye Survey, African Americans were shown to have a prevalence of open-angle glaucoma four to five times higher than whites. Given this high prevalence of glaucoma in the African American population, it is important to recruit and follow an adequate sample of African American subjects in the trial (approximately 25 percent of the total patient sample).
At the conclusion of this study, practitioners should be able to make reasonable estimates of risk for individual ocular hypertensive patients and to determine which ocular hypertensive individuals are most likely to benefit from early prophylactic medical treatment.
- Conditions
- Ocular Hypertension, Glaucoma
- Being tested
- Topical ocular hypotensive eye drops.
- Medical subject headings
- Ocular Hypertension, Glaucoma
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Topical ocular hypotensive eye drops.Drug
Topical ocular hypotensive eye drops.
| Study group | Role | What they receive |
|---|---|---|
| Observation | No intervention | Close Observation. |
| Treatment | Other | Participants treated with commercially available topical ocular hypotensive eye drops. Receives: Drug: Topical ocular hypotensive eye drops. |
What is being measured
The primary outcome is the main question the study is designed to answer.
Incidence of Primary Open-Angle Glaucoma in Hypotensive Patients
Comparison of the cumulative proportion of participants who develop primary open-angle glaucoma in the observation and medication groups.
Measured: 5 yrs (OHTS I, June 2002) and 13.0 yrs (completion of both phases of OHTS, March 2009)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Sep 1999 (estimated)
- Study startFeb 1994
- Primary completionJun 2002
- Study completion30 Jun 2019
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (68)Papers the sponsor has linked to this study.
- Other trials for Ocular HypertensionStudies of the same condition, open and under way.
- More trials run by Washington University School of MedicineThe 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
- Interventional
- Phase
- Phase 3
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 1,636 participants (actual)
Sponsor and investigators
- Lead sponsor
- Washington University School of Medicine
- Sponsor type
- University, hospital or other
- Collaborators
- National Eye Institute (NEI)
- Responsible party
- Sponsor
- Investigators
- Michael A Kass, MD, Study chair, Washington University Department of Ophthalmology and Visual Sciences
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00000125
- Sponsor's protocol ID
- NEI-24
- Other IDs
- 5U10EY009307-16, 5U10EY009341-14
- Acronym
- OHTS
- Status last verified
- May 2020
- First submitted
- 23 Sep 1999
- Last updated
- 2 Jun 2020
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
Publications
Gordon MO, Kass MA. The Ocular Hypertension Treatment Study: design and baseline description of the participants. Arch Ophthalmol. 1999 May;117(5):573-83. doi: 10.1001/archopht.117.5.573.
PubMed 10326953Keltner JL, Johnson CA, Quigg JM, Cello KE, Kass MA, Gordon MO. Confirmation of visual field abnormalities in the Ocular Hypertension Treatment Study. Ocular Hypertension Treatment Study Group. Arch Ophthalmol. 2000 Sep;118(9):1187-94. doi: 10.1001/archopht.118.9.1187.
PubMed 10980763Piltz J, Gross R, Shin DH, Beiser JA, Dorr DA, Kass MA, Gordon MO. Contralateral effect of topical beta-adrenergic antagonists in initial one-eyed trials in the ocular hypertension treatment study. Am J Ophthalmol. 2000 Oct;130(4):441-53. doi: 10.1016/s0002-9394(00)00527-4.
PubMed 11024416Brandt JD, Beiser JA, Kass MA, Gordon MO. Central corneal thickness in the Ocular Hypertension Treatment Study (OHTS). Ophthalmology. 2001 Oct;108(10):1779-88. doi: 10.1016/s0161-6420(01)00760-6.
PubMed 11581049Feuer WJ, Parrish RK 2nd, Schiffman JC, Anderson DR, Budenz DL, Wells MC, Hess DJ, Kass MA, Gordon MO. The Ocular Hypertension Treatment Study: reproducibility of cup/disk ratio measurements over time at an optic disc reading center. Am J Ophthalmol. 2002 Jan;133(1):19-28. doi: 10.1016/s0002-9394(01)01338-1.
PubMed 11755836Johnson CA, Keltner JL, Cello KE, Edwards M, Kass MA, Gordon MO, Budenz DL, Gaasterland DE, Werner E; Ocular Hypertension Study Group. Baseline visual field characteristics in the ocular hypertension treatment study. Ophthalmology. 2002 Mar;109(3):432-7. doi: 10.1016/s0161-6420(01)00948-4.
PubMed 11874743Kass MA, Heuer DK, Higginbotham EJ, Johnson CA, Keltner JL, Miller JP, Parrish RK 2nd, Wilson MR, Gordon MO. The Ocular Hypertension Treatment Study: a randomized trial determines that topical ocular hypotensive medication delays or prevents the onset of primary open-angle glaucoma. Arch Ophthalmol. 2002 Jun;120(6):701-13; discussion 829-30. doi: 10.1001/archopht.120.6.701.
PubMed 12049574Gordon MO, Beiser JA, Brandt JD, Heuer DK, Higginbotham EJ, Johnson CA, Keltner JL, Miller JP, Parrish RK 2nd, Wilson MR, Kass MA. The Ocular Hypertension Treatment Study: baseline factors that predict the onset of primary open-angle glaucoma. Arch Ophthalmol. 2002 Jun;120(6):714-20; discussion 829-30. doi: 10.1001/archopht.120.6.714.
PubMed 12049575Keltner JL, Johnson CA, Cello KE, Edwards MA, Bandermann SE, Kass MA, Gordon MO; Ocular Hypertension Treatment Study Group. Classification of visual field abnormalities in the ocular hypertension treatment study. Arch Ophthalmol. 2003 May;121(5):643-50. doi: 10.1001/archopht.121.5.643.
PubMed 12742841Zangwill LM, Weinreb RN, Berry CC, Smith AR, Dirkes KA, Coleman AL, Piltz-Seymour JR, Liebmann JM, Cioffi GA, Trick G, Brandt JD, Gordon MO, Kass MA; Confocal Scanning Laser Ophthalmoscopy Ancillary Study to the Ocular Hypertension Treatment Study. Racial differences in optic disc topography: baseline results from the confocal scanning laser ophthalmoscopy ancillary study to the ocular hypertension treatment study. Arch Ophthalmol. 2004 Jan;122(1):22-8. doi: 10.1001/archopht.122.1.22.
PubMed 14718290Zangwill LM, Weinreb RN, Berry CC, Smith AR, Dirkes KA, Liebmann JM, Brandt JD, Trick G, Cioffi GA, Coleman AL, Piltz-Seymour JR, Gordon MO, Kass MA; OHTS CSLO Ancillary Study Group. The confocal scanning laser ophthalmoscopy ancillary study to the ocular hypertension treatment study: study design and baseline factors. Am J Ophthalmol. 2004 Feb;137(2):219-27. doi: 10.1016/j.ajo.2003.08.031.
PubMed 14962409Higginbotham EJ, Gordon MO, Beiser JA, Drake MV, Bennett GR, Wilson MR, Kass MA; Ocular Hypertension Treatment Study Group. The Ocular Hypertension Treatment Study: topical medication delays or prevents primary open-angle glaucoma in African American individuals. Arch Ophthalmol. 2004 Jun;122(6):813-20. doi: 10.1001/archopht.122.6.813.
PubMed 15197055Coleman AL, Gordon MO, Beiser JA, Kass MA; Ocular Hypertension Treatment Study. Baseline risk factors for the development of primary open-angle glaucoma in the Ocular Hypertension Treatment Study. Am J Ophthalmol. 2004 Oct;138(4):684-5. doi: 10.1016/j.ajo.2004.05.030.
PubMed 15488816Brandt JD, Beiser JA, Gordon MO, Kass MA; Ocular Hypertension Treatment Study (OHTS) Group. Central corneal thickness and measured IOP response to topical ocular hypotensive medication in the Ocular Hypertension Treatment Study. Am J Ophthalmol. 2004 Nov;138(5):717-22. doi: 10.1016/j.ajo.2004.07.036.
PubMed 15531304Kass MA, Gordon MO, Kymes SM. Incorporating the results of the Ocular Hypertension Treatment Study into clinical practice. Arch Ophthalmol. 2005 Jul;123(7):1021-2. doi: 10.1001/archopht.123.7.1021-b. No abstract available.
PubMed 16009857
Study at a glance
From the registry record, last updated by the sponsor on 2 Jun 2020. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Ocular Hypertension Treatment Study (OHTS)
- ClinicalTrials.gov ID
- NCT00000125
- Acronym / sponsor ID
- OHTS / NEI-24
- Conditions
- Ocular Hypertension, Glaucoma
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 1,636 participants (actual)
- Lead sponsor
- Washington University School of MedicineUniversity, hospital or other
- Collaborators
- National Eye Institute (NEI)
- Study start
- Feb 1994 (actual)
- Primary completion
- Jun 2002 (actual)
- Study completion
- 30 Jun 2019 (actual)
- First posted
- 24 Sep 1999 (estimated)
- Results
- Posted 19 Mar 2015
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
To determine whether medical reduction of intraocular pressure prevents or delays the onset of glaucomatous visual field loss and/or optic disc damage in ocular hypertensive participants judged to be at moderate risk for developing open-angle glaucoma.
To produce natural history data to assist in identifying patients at most risk for developing open-angle glaucoma and those most likely to benefit from early medical treatment.
To quantify risk factors for developing open-angle glaucoma among ocular hypertensive individuals.
Detailed description
OHTS Phase 3 will re-examine study participants 20 plus years after enrollment to document clinical status and the incidence and severity of self-reported functional limitations. The 279 participants who developed POAG in OHTS Phase 1 or 2 will have more than 10 years of post-POAG follow-up by Phase 3. The timing of re-examination at 20 years is meaningful because 20 years approaches the median life expectancy of OHT patients in their 60's and 70's and half the median life expectancy of patients in their 40's and 50's. For the first time, patients with ocular hypertension and clinicians will have high quality data about the long-term risk of developing POAG and functional limitations associated with the disease. These data will facilitate patient-centered care so that patients and clinicians can decide on the appropriate frequency of tests and examinations and the potential benefit of preventative treatment.
Glaucoma is one of the leading causes of blindness in the United States and other industrialized countries. It is estimated that 2 million people in the United States have glaucoma and that 80,000 of these individuals are legally blind from the disease. Among African Americans, glaucoma is now recognized as the leading cause of blindness.
Elevated intraocular pressure (IOP), a common condition affecting 3 to 6 million people in the United States, is thought to be the leading risk factor for development of open-angle glaucoma. There is no consensus that medical reduction of intraocular pressure prevents or delays the onset of visual field and/or optic nerve damage in ocular hypertensive subjects.
Despite the lack of convincing evidence for the efficacy of medical treatment in ocular hypertension, approximately 1.5 million glaucoma suspects in the United States are being treated with costly ocular hypotensive medications that carry the potential for serious and even life-threatening side effects.
Clearly, there is a need for a well-controlled clinical trial to determine whether medical reduction of IOP can prevent or delay the onset of glaucomatous damage in ocular hypertensive subjects. Only then can clinicians and patients make rational choices and health care planners ensure that limited medical resources are being allocated in a safe and cost-effective manner.
The Ocular Hypertension Treatment Study (OHTS) is a long-term, randomized, controlled multicenter clinical trial. Ocular hypertensive subjects judged to be at moderate risk of developing primary open-angle glaucoma are randomly assigned to either close observation only or a stepped medical regimen. Medical treatment consists of all commercially available topical ocular hypotensive eye drops.
After completion of baseline measures (IOP, visual fields, disc photos) and randomization, the subjects are followed for a minimum of 5 years with automated threshold central static perimetry (Humphrey program 30-2) twice yearly and stereoscopic optic disc photographs once yearly. Study end points are reproducible visual field loss and/or progressive optic disc damage in either eye of a patient attributed to glaucoma by a Masked Endpoint Committee. All visual fields and optic disc photographs are read in a masked fashion in Reading Centers.
In the 1991 Baltimore Eye Survey, African Americans were shown to have a prevalence of open-angle glaucoma four to five times higher than whites. Given this high prevalence of glaucoma in the African American population, it is important to recruit and follow an adequate sample of African American subjects in the trial (approximately 25 percent of the total patient sample).
At the conclusion of this study, practitioners should be able to make reasonable estimates of risk for individual ocular hypertensive patients and to determine which ocular hypertensive individuals are most likely to benefit from early prophylactic medical treatment.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Observation | No intervention | –Close Observation. |
| Treatment | Other | Drug: Topical ocular hypotensive eye drops.Participants treated with commercially available topical ocular hypotensive eye drops. |
Who may qualify
- Ages
- 40 to 80 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
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 |
|---|---|---|
| Topical ocular hypotensive eye drops.Topical ocular hypotensive eye drops. | Drug | Treatment |
Primary outcome
Incidence of Primary Open-Angle Glaucoma in Hypotensive Patients
Time frame: 5 yrs (OHTS I, June 2002) and 13.0 yrs (completion of both phases of OHTS, March 2009)
Comparison of the cumulative proportion of participants who develop primary open-angle glaucoma in the observation and medication groups.
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Jun 2020.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Background: PubMed 10326953Gordon MO, Kass MA. The Ocular Hypertension Treatment Study: design and baseline description of the participants. Arch Ophthalmol. 1999 May;117(5):573-83. doi: 10.1001/archopht.117.5.573.
- Background: PubMed 10980763Keltner JL, Johnson CA, Quigg JM, Cello KE, Kass MA, Gordon MO. Confirmation of visual field abnormalities in the Ocular Hypertension Treatment Study. Ocular Hypertension Treatment Study Group. Arch Ophthalmol. 2000 Sep;118(9):1187-94. doi: 10.1001/archopht.118.9.1187.
- Background: PubMed 11024416Piltz J, Gross R, Shin DH, Beiser JA, Dorr DA, Kass MA, Gordon MO. Contralateral effect of topical beta-adrenergic antagonists in initial one-eyed trials in the ocular hypertension treatment study. Am J Ophthalmol. 2000 Oct;130(4):441-53. doi: 10.1016/s0002-9394(00)00527-4.
- Background: PubMed 11581049Brandt JD, Beiser JA, Kass MA, Gordon MO. Central corneal thickness in the Ocular Hypertension Treatment Study (OHTS). Ophthalmology. 2001 Oct;108(10):1779-88. doi: 10.1016/s0161-6420(01)00760-6.
- Background: PubMed 11755836Feuer WJ, Parrish RK 2nd, Schiffman JC, Anderson DR, Budenz DL, Wells MC, Hess DJ, Kass MA, Gordon MO. The Ocular Hypertension Treatment Study: reproducibility of cup/disk ratio measurements over time at an optic disc reading center. Am J Ophthalmol. 2002 Jan;133(1):19-28. doi: 10.1016/s0002-9394(01)01338-1.
- Background: PubMed 11874743Johnson CA, Keltner JL, Cello KE, Edwards M, Kass MA, Gordon MO, Budenz DL, Gaasterland DE, Werner E; Ocular Hypertension Study Group. Baseline visual field characteristics in the ocular hypertension treatment study. Ophthalmology. 2002 Mar;109(3):432-7. doi: 10.1016/s0161-6420(01)00948-4.
- Background: PubMed 12049574Kass MA, Heuer DK, Higginbotham EJ, Johnson CA, Keltner JL, Miller JP, Parrish RK 2nd, Wilson MR, Gordon MO. The Ocular Hypertension Treatment Study: a randomized trial determines that topical ocular hypotensive medication delays or prevents the onset of primary open-angle glaucoma. Arch Ophthalmol. 2002 Jun;120(6):701-13; discussion 829-30. doi: 10.1001/archopht.120.6.701.
- Background: PubMed 12049575Gordon MO, Beiser JA, Brandt JD, Heuer DK, Higginbotham EJ, Johnson CA, Keltner JL, Miller JP, Parrish RK 2nd, Wilson MR, Kass MA. The Ocular Hypertension Treatment Study: baseline factors that predict the onset of primary open-angle glaucoma. Arch Ophthalmol. 2002 Jun;120(6):714-20; discussion 829-30. doi: 10.1001/archopht.120.6.714.
- Background: PubMed 12742841Keltner JL, Johnson CA, Cello KE, Edwards MA, Bandermann SE, Kass MA, Gordon MO; Ocular Hypertension Treatment Study Group. Classification of visual field abnormalities in the ocular hypertension treatment study. Arch Ophthalmol. 2003 May;121(5):643-50. doi: 10.1001/archopht.121.5.643.
- Background: PubMed 14718290Zangwill LM, Weinreb RN, Berry CC, Smith AR, Dirkes KA, Coleman AL, Piltz-Seymour JR, Liebmann JM, Cioffi GA, Trick G, Brandt JD, Gordon MO, Kass MA; Confocal Scanning Laser Ophthalmoscopy Ancillary Study to the Ocular Hypertension Treatment Study. Racial differences in optic disc topography: baseline results from the confocal scanning laser ophthalmoscopy ancillary study to the ocular hypertension treatment study. Arch Ophthalmol. 2004 Jan;122(1):22-8. doi: 10.1001/archopht.122.1.22.
- Background: PubMed 14962409Zangwill LM, Weinreb RN, Berry CC, Smith AR, Dirkes KA, Liebmann JM, Brandt JD, Trick G, Cioffi GA, Coleman AL, Piltz-Seymour JR, Gordon MO, Kass MA; OHTS CSLO Ancillary Study Group. The confocal scanning laser ophthalmoscopy ancillary study to the ocular hypertension treatment study: study design and baseline factors. Am J Ophthalmol. 2004 Feb;137(2):219-27. doi: 10.1016/j.ajo.2003.08.031.
- Background: PubMed 15197055Higginbotham EJ, Gordon MO, Beiser JA, Drake MV, Bennett GR, Wilson MR, Kass MA; Ocular Hypertension Treatment Study Group. The Ocular Hypertension Treatment Study: topical medication delays or prevents primary open-angle glaucoma in African American individuals. Arch Ophthalmol. 2004 Jun;122(6):813-20. doi: 10.1001/archopht.122.6.813.
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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.
Michael A Kass, MD study chair
Washington University Department of Ophthalmology and Visual Sciences
Questions about this trial
What is this clinical trial studying?
A Phase 3 study testing Topical ocular hypotensive eye drops. in people with Ocular Hypertension and Glaucoma, run by Washington University School of Medicine.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
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 2 Jun 2020. Status can change between updates, so confirm with the study contact before making plans.
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.
What does this phase mean?
Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 19 Mar 2015). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
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?
Incidence of Primary Open-Angle Glaucoma in Hypotensive Patients (time frame: 5 yrs (OHTS I, June 2002) and 13.0 yrs (completion of both phases of OHTS, March 2009)). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00000125, which also lists 68 linked publications.
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 2 Jun 2020; AzTrials last refreshed its copy on 3 Nov 2026.