Table 2.
Characteristics of study participants (mean ± SD)
| Characteristic | OCP Users (n = 43) | Non-OCP Users (n = 248) | P Value |
|---|---|---|---|
| Current age, y | 16.4 ± 1.1 | 15.3 ± 1.1 | <0.00a |
| Grade in school, n (%) | <0.00b | ||
| 9 | 5 (11.6%) | 94 (37.9%) | |
| 10 | 8 (18.6%) | 78 (31.5%) | |
| 11 | 10 (23.3%) | 45 (18.1%) | |
| 12 | 20 (46.5%) | 31 (12.5%) | |
| Age at menarche, y | 12.3 ± 1.1 | 12.4 ± 1.1 | 0.57a |
| Height, m | 1.66 ± 0.07 | 1.67 ± 0.07 | 0.78a |
| Weight, kg | 60.6 ± 9.3 | 58.7 ± 9.4 | 0.22a |
| BMI, kg/m2 | 21.9 ± 3.0 | 21.1 ± 2.9 | 0.12a |
| Median months on OCP (range) | 6 (1-48) |
OCP, oral contraceptive pill; BMI, body mass index.
a
t test.
b
Fisher exact test.