Table 5.

Logistic Regression of Factors and Responses Associated with Nonadherence in the Travatan Dosing Aid (TDA) Study (Derivation Cohort)

	Univariate Odds Ratio (95% CI)	P	Stepwise Multivariate Odds Ratio (95% CI)	P
Age ≤50 years	3.28 (1.28–8.39)	0.013	2.75 (0.89–8.44)	0.078
Race
White and other (reference)	1		1
Black	3.03 (1.69–5.45)	<0.001	3.27 (1.64–6.49)	0.001
Education
College and postgraduate (reference)	1
High school	1.21 (0.62–2.36)	0.567
Primary school	2.98 (1.05–8.45)	0.040	—
Self-reported general health
Excellent (reference)	1		1
Good	1.97 (0.98–3.95)	0.055	2.32 (0.99–5.45)	0.053
Poor or fair	2.69 (1.05–6.90)	0.039	2.94 (0.96–8.98)	0.058
Duration of treatment (yrs)
>10 (reference)	1		1
1–10	2.48 (1.21–5.08)	0.013	2.32 (1.04–5.17)	0.041
≤1	2.98 (1.24–7.19)	0.015	1.77 (0.65–4.77)	0.262
Reported adherence ≤95%	2.80 (1.40–5.59)	0.004	2.58 (1.17–5.71)	0.019
Glaucoma drop use in past 2 weeks
Everyday (reference)	1		—
All but 1 or 2	1.78 (0.85–3.72)	0.125
Not for >2 days	3.19 (1.03–9.82)	0.044
Some days I forgot to take drops
Strongly disagree (reference)	1		—
Somewhat disagree/neither	3.75 (1.06–13.22)	0.040
Somewhat/strongly agree	2.34 (1.25–4.39)	0.008
Reasons why don’t take eye drops
Always take it	1		—
Any reasons (forgot, inconvenient, side effects, don’t need it, don’t want it, etc.)	2.62 (1.45–4.73)	0.001
Follows doctor’s orders exactly
Strongly/somewhat agree (reference)	1		1
Neither/somewhat/strongly disagree	2.79 (1.07–7.26)	0.035	3.18 (0.85–12.01)	0.087

CI = confidence interval.