Table 4.

Univariable and multivariable Poisson regression analysis of factors associated with eyecare visits within 1 year.

	Univariable Analysis	Multivariable Analysis
	P value	RR (95% CI)		P value
Sex
Female	REF		REF
Male	0.452	0.98 (0.96–0.99)		< 0.001
Age
<40	0.003	0.99 (0.95–1.05)		0.816
40–49	REF		REF
50–59	<0.001	1.06 (1.03–1.09)		< 0.001
60–69	<0.001	1.13 (1.10–1.16)		< 0.001
70–79	<0.001	1.15 (1.12–1.19)		< 0.001
80+	<0.001	1.19 (1.15–1.23)		< 0.001
Race
Asian	0.003	0.98 (0.96–1.00)		0.068
White	REF	REF
Black	<0.001	1.03 (1.00–1.05)		0.019
Hispanic	0.005	1.01 (0.99–1.03)		0.413
Education
High school or less	REF		REF
Some college	0.018	1.01 (1.00–1.03)		0.149
College graduate	<0.001	1.04 (1.01–1.06)		0.001
Income
<$40K	REF		REF
$40K-49K	0.758	1.00 (0.97–1.02)		0.912
$50K-59K	0.493	1.02 (1.00–1.04)		0.118
$60K-74K	0.033	1.01 (0.99–1.04)		0.212
$75K-99K	0.036	1.03 (1.01–1.05)		0.013
$100K+	<0.001	1.03 (1.01–1.05)		0.001
Location
Northeast	REF		REF
South	0.244	0.98 (0.96–1.00)		0.012
Midwest	<0.001	0.94 (0.92–0.95)		< 0.001
Mountain	0.976	0.95 (0.93–0.98)		0.002
Pacific	0.760	1.00 (0.98–1.03)		0.685
Gonioscopy
No	REF		REF
Yes	<0.001	1.01 (1.00–1.02)		0.240
Insurance
COM HMO/EPO	REF		REF
COM Other	0.068	0.99 (0.97–1.01)		0.371
COM PPO	0.360	0.95 (0.91–1.00)		0.077
MCR HMO/EPO	<0.001	0.93 (0.90–0.95)		< 0.001
MCR Other	<0.001	0.98 (0.96–1.01)		0.230
MCR PPO	<0.001	1.02 (0.99–1.06)		0.191
LPI Treatment
No	REF		REF
Yes	<0.001	1.38 (1.37–1.40)		< 0.001
IOP-lowering Drops
No	REF		REF
Yes	<0.001	1.73 (1.71–1.76)		< 0.001
Cataract Surgery Treatment
No	REF		REF
Yes	<0.001	1.41 (1.39–1.43)		< 0.001

Statistically significant p-values and odds ratios are bolded.

Abbreviations: RR = rate ratio; CI = confidence interval; REF = reference group; COM = commercial health insurance; MCR = Medicare health insurance; HMO = health maintenance organization; EPO = exclusive provider organization; PPO = preferred provider organization.