Variables studied | Girls already sexually active | OR [95% CI] | p-value | |
Yes (n = 649) | No (n = 330) | |||
1. Sibling size |
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≤ 3 | 66 (10.2) | 44 (13.3) | 0.74 [0.49 - 1.11] | 0.13840 |
4 - 7 | 286 (44.1) | 154 (46.7)) | 0.90 [0.69 - 1.17] | 0.43968 |
8 - 11 | 209 (32.2) | 88 (26.7) | 1.31 [0.97 - 1.75] | 0.07485 |
12 - 15 | 75 (11.6) | 43 (13.0) | 0.87 [0.58 - 1.30] | 0.50308 |
≥16 | 13 (2.0) | 1 (0.03) | 6.72 [0.87 - 51.63] | 0.03418 |
M ± ET | 7.4 ± 3.2 | 6.6 ± 3.3 | 0.50 [0.21 - 1.17] |
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Extreme | 1 et 18 | 1 et 14 |
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2. Sibling rank |
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≤ 3rd | 407 (62.7) | 209 (63.3) | 0.97 [0.74 - 1.28] | 0.84907 |
4 - 7th | 165 (25.4) | 77 (23.4) | 1.12 [0.82 - 1.53] | 0.47354 |
≥8th | 77 (11.9) | 44 (13.3) | 0.88 [0.59 - 1.30] | 0.50917 |
M ± ET | 3.5 ± 2.5 | 3.8 ± 2.9 | KW = 1.7498 | 0.1859 |
Extreme | 1 et 10 | 1 et 13 |
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2. Menarche age |
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|
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10 - 11 | 31 (4.8) | 32 (9.7) | 0.47 [0.28 - 0.78] | 0.00302 |
12 - 13 | 231 (35.6) | 165 (50.0) | 0.55 [0.42 - 0.72] | 0.00001 |
14 - 15 | 319 (49.2) | 99 (30.0) | 2.26 [1.70 - 2.99] | 0.00000 |
16 - 17 | 68 (10.5) | 34 (10.3) | 1.02 [0.66 - 1.57] | 0.93262 |
M ± ET | 13.7 ± 1.4 | 13.4 ± 1.5 | F = 5.5777 | 0.0184 |
Extreme | 11 et 17 | 11 et 17 |
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