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CompletedNCT00794170I-SIGHTUpdated Jun 9, 2014Results posted

Interactive Study to Increase Glaucoma Adherence to Treatment

An interventional study of Telephone and Print based intervention in Glaucoma, sponsored by Emory University. Completed at 2 sites in United States. Open to participants aged 18 Years to 80 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2014-06-09.

Sponsored by Emory University · Not applicable and Interventional

Phase
Not applicable
Study type
Interventional
Enrollment
312
Allocation
Randomized
Ages
18 Years to 80 Years
Sex
All
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Study summary

Study participants who receive the I-SIGHT intervention will have higher rates of glaucoma treatment compliance (e.g., medication-taking and refill compliance, return for clinical follow-up) and more positive eye health outcomes at 12-month follow-up than participants who receive the control group intervention.

Read the detailed description

The intervention is telephone-based and individually-tailored to participants' compliance knowledge, attitudes, and behaviors; psychosocial predictors of compliance; health literacy; race and culture; and prescribed medication regimen. The intervention calls utilize interactive voice recognition technology to facilitate interest, participation, and interaction with call recipients. We evaluated the intervention in a randomized controlled trial with telephone interviews administered to all participants at baseline, 6, 9, and 12-months

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Conditions studied

  • Glaucoma

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Keywords

  • Treatment Compliance
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In context

Glaucoma

1,818 studies on the registry are indexed under Glaucoma; 231 are open to participants now.

This study's enrollment of 312 is above the median of 65 across 1,272 interventional studies indexed under Glaucoma.

Browse Glaucoma studies →

Lead sponsor

Emory University is the lead sponsor of 1,386 studies on the registry; 236 are open to participants now.

Of its 229 completed or terminated interventional studies of FDA-regulated products, 174 (76%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Receive treatment at the Atlanta VA Medical Center or Grady Eye clinic for their eye condition
  • Be between the ages of 18-80
  • Be Caucasian or African American
  • Possess a telephone (home telephone or cellular phone)
  • Speak and understand English
  • Be diagnosed with open angle glaucoma, be glaucoma suspect, or be ocular hypertensive for at least one year
  • Be prescribed daily doses of topical treatments for at least one year
  • Be able to read or have someone who can help the participant with reading written materials that we give to the participant

Exclusion criteria

Exclusion Criteria:

  • Having eye surgery within 3 months of baseline interview and enrollment
  • Being legally blind (20/200 or worse)
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Study design

Phase
Not applicable
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
312 participants (actual)

Study arms

  • Experimental
    Telephone and print based intervention

    The I-SIGHT intervention consists of twelve interactive voice recognition (IVR) phone calls over a nine-month period and accompanying printed materials that are mailed to participants following each call. The phone call messages and print materials are tailored to individuals' circumstances using data from the screening and baseline interviews. The intervention is based on theoretical constructs from Social Cognitive Theory and the Health Belief Model, and emphasizes self-efficacy, medication taking skills, outcome expectancies, facilitators and barriers to compliance, and social support. The treatment group receives the tailored telephone intervention and mailed, printed materials.

    Behavioral: Telephone and Print based intervention

  • No intervention
    Usual care

    The control group received usual care at each clinical site and interacted with study personnel only for data collection.

Interventions

  • BehavioralTelephone and Print based intervention

    Thiss intervention consisted of tailored phone calls and follow-up mailings.

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What researchers measure

Primary outcomes

  1. Data on Prescription Drug Renewals, Appointment Compliance and Medication Taking (e.g. Physician Notes)

    The adherence measure, developed and pilot tested by the I-SIGHT study team, assessed compliance adherence with medication taking, refills, and appointment-keeping by self-report and chart review. Subjects were considered nonadherent with medication-taking if they reported missing doses of any glaucoma medication within one month of the interview. Levels of medication-taking nonadherence were also examined by missed doses within 7 days, 2 weeks, or 1 mo of the interview. Nonadherence with refills was defined as running out of any glaucoma medication and missing a dose within a specified time frame (i.e. 1 year prior to the baseline interview; 6 months prior to 6-month interview; and 3 months prior to the 9 and 12 month interview). Appointment-keeping nonadherence was indicated by self-report of missing a glaucoma treatment appointment and not rescheduling during the specified time frame. Self-report of nonadherence in any of these three areas classified the subject as nonadherent.

    Time frame: Baseline and 12 months

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Results

Posted Jun 9, 2014
Limitations and caveats
There may have been a selection bias that contributed to a placebo effect in the control group. The "control" patients may have already been motivated to seek knowledge or involvement in management of glaucoma.

Participant flow

Participant flow — Overall Study
MilestoneTelephone and Print Based InterventionUsual Care
Started157155
Completed150152
Not completed73

Outcome measures

PrimaryData on Prescription Drug Renewals, Appointment Compliance and Medication Taking (e.g. Physician Notes)

The adherence measure, developed and pilot tested by the I-SIGHT study team, assessed compliance adherence with medication taking, refills, and appointment-keeping by self-report and chart review. Subjects were considered nonadherent with medication-taking if they reported missing doses of any glaucoma medication within one month of the interview. Levels of medication-taking nonadherence were also examined by missed doses within 7 days, 2 weeks, or 1 mo of the interview. Nonadherence with refills was defined as running out of any glaucoma medication and missing a dose within a specified time frame (i.e. 1 year prior to the baseline interview; 6 months prior to 6-month interview; and 3 months prior to the 9 and 12 month interview). Appointment-keeping nonadherence was indicated by self-report of missing a glaucoma treatment appointment and not rescheduling during the specified time frame. Self-report of nonadherence in any of these three areas classified the subject as nonadherent.

Time frame:
Baseline and 12 months
Reported as:
Number · participants
Data on Prescription Drug Renewals, Appointment Compliance and Medication Taking (e.g. Physician Notes)
participantsTelephone and Print InterventionUsual Care
Data on Prescription Drug Renewals, Appointment Compliance and Medication Taking (e.g. Physician Notes)150152

Adverse events

Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Telephone and Print Based Intervention—0/157 (0%)0/157 (0%)
Usual Care—0/155 (0%)0/155 (0%)

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Telephone and Print Based InterventionUsual CareTotal
<=18 years000
Between 18 and 65 years9195186
>=65 years6660126
Sex: Female, Male
Sex: Female, Male(Participants)Telephone and Print Based InterventionUsual CareTotal
Female5958117
Male9897195
Region of Enrollment
Region of Enrollment(participants)Telephone and Print Based InterventionUsual CareTotal
United States157155312
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Study locations

2 sites
  • Atlanta VA Medical Center
    Atlanta, Georgia 30033, United States
  • Grady Health System
    Atlanta, Georgia 30303, United States
09

References and documents

Publications

  • Glanz K, Beck AD, Bundy L, Primo S, Lynn MJ, Cleveland J, Wold JA, Echt KV. Impact of a health communication intervention to improve glaucoma treatment adherence. Results of the interactive study to increase glaucoma adherence to treatment trial. Arch Ophthalmol. 2012 Oct;130(10):1252-8. doi: 10.1001/archophthalmol.2012.1607. PubMed 22688429 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 9, 2014, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT00794170
Lead sponsor
Emory University
Responsible party
Karen Glanz, MD (Adjunct Professor of Public Health, Emory University) — Principal investigator
First posted
Nov 19, 2008
Start date
Aug 2008
Primary completion
Jun 2010
Completion
Sep 2010
Results posted
Jun 9, 2014
Last update
Jun 9, 2014

Study contacts

Karen Glanz, PhD, MPH
principal investigator · Emory University

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in May 2014. You cannot join it, but the record below documents what was studied.

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