TABLE 7:
FINAL MULTIVARIATE LINEAR REGRESSION MODEL OF THE GTCAT QUESTIONS. GLAUCOMA TREATMENT ASSESSMENT TOOL STUDY*
| GLAUCOMA TREATMENT COMPLIANCE ASSESSMENT TOOL QUESTIONS |
MULTIVARIATE ANALYSIS β |
P† |
|---|---|---|
| Question 16: Personal knowledge of risk factors for glaucoma | −1.16 | .03 |
| Question 33: I am likely to use the drops every night. | 4.08 | .01 |
| Question 34: What level of side effects to you experience with your drops? | −1.96 | .02 |
| Age, years older | .18 | .11 |
| White primary ethnicity vs other ethnicity | 4.89 | .20 |
Table includes only variables that were significant at a P ≤ .05 in the multivariate linear regression model from first stage (demographic, socioeconomic, and medical factors) and second stage (Health Belief Model questions) of model building. This analysis includes n=57 participants, and excluded one participant because of a Travatan Dosing Aid (Alcon, Fort Worth, Texas) malfunction. Adherence was defined as the proportion of days (from 0 to 100%) in which any drop was taken within 6 hours of the designated time. Beta coefficients are presented as unstandardized. R2 was .44 for the full multivariate model including all variables below, and .40 for the reduced model including only those questions significant at P value ≤ .05 (questions 16, 33, and 34 in bold).
P value for multivariate analysis for higher percentage of adherence.