Table 3.

Clinical Characteristics of Glaucoma Patients Using Glaucoma Medications (n = 157) in a County Hospital Population, by Medication Adherence

Characteristic	Medication Adherent Individuals (n=72)	Medication Non-Adherent Individuals (n=85)	Unadjusted OR for Poor Medication Adherence (95% CI)	P value
Years with a glaucoma diagnosis, mean (SD)	6.17 (5.38)	6.52 (6.91)		0.72
Number of glaucoma medications, mean (SD)	2.29 (1.33)	2.04 (1.22)		0.22
One	25 (34.7)	32 (37.6)	1 [Reference]	NA
Two	19 (26.4)	14 (16.5)	0.58 (0.24–1.36)	0.27
Three	7 (9.7)	26 (30.6)	2.90 (1.08–7.72)	0.04
Four or more	21 (29.2)	13 (15.3)	0.48 (0.20–1.15)	0.13
Number of drops per eye per day
1 to 2 drops	23 (31.9)	25 (29.4)	1 [Reference]	NA
3 to 4 drops	10 (13.9)	8 (9.4)	0.74 (0.25–2.18)	0.78
5 to 9 drops	20 (27.8)	21 (24.7)	0.97 (0.42–2.22)	1.00
10 or greater drops	19 (27.1)	31 (36.5)	1.50 (0.67–3.35)	0.41
Monthly out-of-pocket cost of medications (dollars)
0	25 (34.7)	45 (52.9)	1 [Reference]	NA
0.01 to 5	22 (30.6)	20 (23.5)	0.51 (0.23–1.10)	0.11
5.01 to 10	6 (8.3)	3 (3.5)	0.28 (0.06–1.20)	0.14
10.01 to 15	3 (4.2)	2 (2.4)	0.37 (0.06–2.37)	0.36
15 or greater	16 (22.2)	15 (17.6)	0.52 (0.22–1.22)	0.19
Drug Therapeutic Category
Prostaglandins (yes vs. no)	51 (80.9)	48 (76.2)	0.85 (0.44–1.63)	0.62
Alpha-Agonists (yes vs. no)	22 (34.9)	24 (38.1)	1.15 (0.56–2.37)	0.71
CAI (yes vs. no)	22 (34.9)	21 (33.3)	0.88 (0.43–1.78)	0.72
Beta Blockers (yes vs. no)	45 (71.4)	42 (66.7)	0.80 (0.38–1.71)	0.56
Combination (yes vs. no)	1 (1.6)	1 (1.6)	1.0 (0.06–16.35)	1.00

CI = confidence interval

OR = odds ratio

SD = standard deviation

CAI= carbonic anhydrase inhibitor