TABLE 6.
RESULTS OF UNIVARIATE AND MULTIVARIATE LINEAR REGRESSION BETWEEN HEALTH BELIEF MODEL QUESTIONS AND ADHERENCE USING DATA FROM THE OBSERVATIONAL CASE SERIES. GLAUCOMA TREATMENT ASSESSMENT TOOL STUDY*
| HEALTH BELIEF QUESTIONS† |
UNIVARIATE ANALYSIS B |
P‡ |
MULTIVARIATE ANALYSIS B |
P§ |
|---|---|---|---|---|
| Question 16: Personal knowledge of risk factors for glaucoma | −1.26 | .06 | −1.15 | .04 |
| Question 29: How well do drops control glaucoma? | 2.56 | .10 | 1.07 | .44 |
| Question 32a: I forget to use the drops | −9.16 | .01 | −4.62 | .18 |
| Question 32c: The drops aren’t with me when it is time to take them. | −12.19 | .007 | −6.26 | .22 |
| Question 32d: How much pain or discomfort do your eye drops cause you? | −2.21 | .02 | 9.59 | .16 |
| Question 33: I am likely to use the drops every night. | 5.66 | .001 | 5.61 | <.001 |
| Question 34: What level of side effects do you experience with your drops? | −2.95 | .001 | −2.53 | .001 |
This table includes only those questions with P ≤ .10 using univariate analysis. This analysis includes n=57 participants and excluded one participant because of a Travatan Dosing Aid 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 (β) coefficients are presented as unstandardized. R2 was .40 for the multivariate model including only questions 16, 33, and 34 in bold.
We excluded 3 questions because of ceiling effects (≥90% listing “10” on the Likert scale) from analysis. These were: (1) How much do you agree with your doctor’s diagnosis of glaucoma?; (2) How important is it to maintain your current level of eyesight in your better-seeing eye?; and (3) How important is it to maintain your current level of eyesight in your worse-seeing eye?.
P value for univariate analysis for higher percentage of adherence (linear regression model).
P value for multivariate analysis for higher percentage of adherence.