Table 2—

Overall and age- and sex-specific incidence density and relative hazards of nontraumatic PRP (ICD-9: 39.25, 39.29, and 39.59) in the diabetic and control groups

Variables*Control group
Diabetic group
Adjusted HR (95% CI) in association with diabetic group
Patients (n)No. of eventsID (per 100,000 patient-years) (95% CI)Patients (n)No. of eventsID (per 100,000 patient-years) (95% CI)
Men (years of age)
<357,33327.0 (−2.7 to 16.7)7,333819.8 (6.1–33.5)2.71 (0.57–12.88)
35–4425,01721.7 (−0.677 to 4.1)25,0184129.9 (20.7–39.0)15.68 (3.80–65.24)
45–5447,1142310.3 (6.1–14.4)47,11214656.7 (47.5–65.9)3.99 (3.11–5.11)
55–6463,5117024.4 (18.7–30.2)63,502429127.4 (115.4–139.5)5.05 (3.91–6.52)
65–7469,76919657.3 (49.3–65.3)69,749629178.8 (164.9–192.8)3.06 (2.60–3.60)
75–8420,5424853.6 (38.4–68.7)20,538146160.1 (134.2–186.1)3.03 (2.18–4.22)
>841,369120.8 (−19.97 to 61.5)1,369599.9 (12.3–187.5)5.51 (0.63–47.89)
Total234,65534231.3 (28.0–34.6)234,7221,405115.2 (109.1–121.2)3.56 (3.18–4.03)
Women (years of age)
<357,830007,8301125.2 (10.3–40.1)NA§
35–4419,31555.5 (0.7–10.2)19,3123633.2 (22.4–44.1)6.00 (2.34–15.22)
45–5449,469135.5 (2.5–8.5)49,46613849.8 (41.5–58.2)8.72 (4.93–15.41)
55–6483,5497519.0 (14.7–23.3)83,54536780.1 (71.9–88.2)3.99 (3.11–5.11)
65–7477,41112933.9 (28.1–39.8)77,406528131.0 (119.9–142.2)3.82 (3.14–4.64)
75–8425,9934539.0 (27.6–50.3)25,990130108.5 (89.9–127.2)2.81 (1.99–3.96)
>842,024227.1 (−10.57 to 64.7)2,02410132.5 (50.4–214.7)4.61 (0.99–21.50)
Total265,59126921.4 (18.9–24.0)265,6291,22086.0 (81.2–90.9)3.92 (3.43–4.47)
  • *

    * Inconsistency between total population and population summed for individual variables was due to missing information.

  • Based on Poisson assumption.

  • Based on Cox proportional hazard regression with adjustment for age, sex, geographic area, and urbanization status.

  • §

    § Not applicable (NA) due to no event of clinical end points for the control group <35 years of age. ID, incidence density.