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. Author manuscript; available in PMC: 2015 Jun 24.
Published in final edited form as: JAMA Ophthalmol. 2014 Feb;132(2):162–167. doi: 10.1001/jamaophthalmol.2013.6046

Table 3.

Crude and adjusted rate ratios (RRs) and 95% confidence intervals (CIs) for eye care utilization within one- and two-years of first clinic visit by demographic and disease characteristics

Characteristics Eye care ≤ 1 year Eye care ≤ 2 years

Eye care utilization per 100 patients RR (95% CI) aRR* (95% CI) Eye care utilization per 100 patients RR (95% CI) aRR* (95% CI)
Sex
 Male 33.3 Ref Ref 46.1 Ref Ref
 Female 33.2 0.99 (0.78–1.26) 0.95 (0.74–1.21) 44.3 0.96 (0.78–1.18) 0.94 (0.76–1.16)
Race/Ethnicity
 Non-Hispanic White 28.7 Ref Ref 38.4 Ref Ref
 Non-Hispanic 33.7 1.18 (0.86–1.61) 1.16 (0.84–1.59) 46.1 1.20 (0.92–1.58) 1.19 (0.91–1.57)
African American
 Hispanic 42.3 1.48 (0.77–2.84) 1.31 (0.64–2.67) 57.7 1.50 (0.86–2.64) 1.38 (0.75–2.53)
 Other 43.8 1.53 (0.69–3.38) 1.40 (0.62–3.15) 43.8 1.14 (0.52–2.49) 1.05 (0.47–2.32)
Age Group1
 65+ 41.2 Ref Ref 51.8 Ref Ref
 40–64 34.4 0.83 (0.58–1.19) 0.76 (0.49–1.16) 46.3 0.89 (0.65–1.22) 0.85 (0.58–1.24)
 19–39 22.9 0.55 (0.34–0.90) 0.48 (0.27–0.84) 35.0 0.68 (0.45–1.02) 0.61 (0.38–0.99)
Marital status
 Not married 32.1 Ref Ref 43.6 Ref Ref
 Married 37.7 1.17 (0.89–1.55) 1.08 (0.80–1.46) 50.6 1.16 (0.91–1.47) 1.09 (0.84–1.41)
Time since diabetes diagnosis2
 10+ years 36.4 Ref Ref 47.3 Ref Ref
 5 to 9 years 45.5 1.25 (0.74–2.12) 1.23 (0.73–2.09) 59.4 1.26 (0.79–1.99) 1.22 (0.77–1.94)
 1 to 4 year 31.0 0.85 (0.54–1.36) 0.81 (0.50–1.31) 43.0 0.91 (0.61–1.37) 0.87 (0.57–1.32)
 < 1 year 31.7 0.87 (0.53–1.43) 0.83 (0.50–1.39) 42.2 0.89 (0.58–1.37) 0.85 (0.54–1.33)
Diabetes severity
 Controlled 31.7 Ref Ref 42.2 Ref Ref
 Uncontrolled 34.3 1.08 (0.85–1.38) 1.14 (0.89–1.47) 46.7 1.10 (0.90–1.36) 1.14 (0.92–1.42)
 With complications 25.0 0.79 (0.20–3.20) 0.86 (0.21–3.53) 37.5 0.89 (0.28–2.79) 0.93 (0.29–2.94)
Insurance type
 Indigent 34.2 Ref Ref 46.2 Ref Ref
 Medicare 34.9 1.02 (0.77–1.35) 0.79 (0.55–1.13) 47.6 1.03 (0.81–1.31) 0.86 (0.64–1.16)
 Medicaid 27.5 0.80 (0.54–1.20) 0.76 (0.51–1.15) 35.3 0.76 (0.54–1.08) 0.73 (0.51–1.04)
 Self-pay 22.2 0.65 (0.29–1.47) 0.63 (0.28–1.42) 37.0 0.80 (0.43–1.51) 0.78 (0.41–1.47)
 Private 31.3 0.91 (0.38–2.22) 0.85 (0.35–2.09) 43.8 0.95 (0.45–2.00) 0.89 (0.42–1.89)
*

Adjusted for sex, race, age group, marital status, time since diabetes diagnosis, diabetes severity, and insurance type.

1

Time since diabetes diagnosis not included in the adjusted model

2

Age not included in the adjusted model