Table 1.
Characteristic | Overall N (%) | Incidence rate per 100,000 person-years | 95% CI for incidence rate |
---|---|---|---|
Overall | 3183 | 4.20 | (4.13–4.27) |
Sex | |||
Male | 2228 (70.0) | 6.11 | (6.01–6.22) |
Female | 955 (30.0) | 2.43 | (2.33–2.53) |
Age, years | |||
18 to 25 | 1694 (53.3) | 21.30 | (21.08–21.52) |
26 to 45 | 764 (24.0) | 2.04 | (1.91–2.17) |
46 and over | 725 (22.8) | 0.69 | (0.60–0.78) |
Mean (S.D.) | 33.42 (15.1) | ||
Race | |||
Asian | 27 (0.8) | 0.81 | (0.47–1.15) |
Black | 265 (8.3) | 3.98 | (3.74–4.22) |
Hispanic | 232 (7.3) | 2.90 | (2.68–3.12) |
White | 2383 (74.9) | 4.81 | (4.72–4.89) |
Unknown | 276 (8.7) | 3.35 | (3.14–3.57) |
Census division | |||
East North Central | 826 (26.0) | 7.69 | (7.50–7.88) |
East South Central | 145 (4.6) | 5.52 | (5.13–5.90) |
Middle Atlantic | 316 (9.9) | 5.97 | (5.70–6.24) |
Mountain | 280 (8.8) | 3.77 | (3.54–4.00) |
New England | 166 (5.2) | 6.61 | (6.22–7.00) |
Pacific | 244 (7.7) | 2.44 | (2.25–2.64) |
South Atlantic | 669 (21.0) | 3.80 | (3.65–3.95) |
West North Central | 309 (9.7) | 3.99 | (3.77–4.22) |
West South Central | 220 (6.9) | 2.04 | (1.85–2.22) |
Unknown | 8 (0.3) | 0.74 | (0.14–1.33) |
Plan type | |||
Commercial | 2551 (80.1) | 4.69 | (4.61–4.78) |
Medicare, under age 65 | 514 (16.1) | 19.78 | (19.39–20.16) |
Medicare, age 65 and over | 118 (3.7) | 0.63 | (0.48–0.77) |