Frequencies and incidence rates of repeat diagnoses of genital C trachomatis infections during follow up of a cohort of previously infected US army soldiers, 1994–July 1999
Incident cases (%) | Person years of follow up | Repeat diagnoses (per 1000 person years) | Rate ratio (RR) (95% CI) | |
---|---|---|---|---|
*Mean ages: women = 22.46 years, men = 23.77 years. | ||||
†Grades E1–E4 approx $11 520 to $17 820; grades E5–O4, $18 168 to $40 716 per annum (1998 US$). | ||||
Overall | 879 | 16903.26 | 52.00 | — |
Sex | ||||
Female | 557 (63.4) | 8466.44 | 65.79 | 1.72 (1.50–1.98) |
Male | 322 (36.6) | 8436.81 | 38.17 | 1.00 |
Age* | ||||
<20 | 134 (15.2) | 3023.29 | 44.32 | 3.50 (1.54–7.93) |
20–24 | 557 (63.4) | 9002.21 | 61.87 | 4.89 (2.19–10.92) |
25–29 | 146 (16.6) | 3285.18 | 44.44 | 3.51 (1.55–7.94) |
30–34 | 36 (4.1) | 1118.82 | 32.18 | 2.54 (1.07–6.03) |
35+ | 6 (0.7) | 473.75 | 12.66 | 1.00 |
Race | ||||
Black | 558 (63.5) | 9831.40 | 56.76 | 1.17 (0.92–1.47) |
White | 240 (27.3) | 5406.42 | 44.39 | 0.91 (0.71–1.17) |
Other | 81 (9.2) | 1665.43 | 48.64 | 1.00 |
Marital status | ||||
Married | 234 (26.7) | 5631.84 | 41.55 | 0.87 (0.62–1.23) |
Single | 607 (69.1) | 10474.08 | 57.95 | 1.22 (0.88–1.69) |
Other | 38 (4.3) | 797.34 | 47.66 | 1.00 |
Military rank (grade)† | ||||
PVT (E1–E2) | 152 (17.3) | 3969.69 | 38.29 | 1.27 (1.00–1.62) |
PFC-CPL (E3–E4) | 613 (69.7) | 9147.45 | 67.01 | 2.22 (1.82–2.72) |
SGT-LTC (E5–O5) | 114 (12.9) | 3784.52 | 30.12 | 1.00 |