Table 3. Association between risk behavior and timing of first nocturnal ejaculation.
| Risk behavior | Early puberty groupa) | Normal puberty groupb) | Unadjusted | Adjusted | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| N | % | 95% CI | N | % | 95% CI | OR (95% CI) | P-value | OR (95% CI)c) | P-value | |
| Smoking | ||||||||||
| Yes | 282 | 47.2 | 42.6–51.7 | 3,714 | 38.7 | 37.1–40.3 | 1.41 (1.17–1.70) | <0.001 | 1.22 (0.97–1.53) | 0.08 |
| No | 313 | 52.8 | 48.2–57.4 | 6,017 | 61.3 | 59.7–62.9 | ||||
| Alcohol consumption | ||||||||||
| Yes | 408 | 68.3 | 64.3–72.0 | 6,172 | 63.7 | 62.3-65.1 | 1.22 (1.02–1.47) | <0.001 | 1.17(0.94–1.45) | 0.15 |
| No | 187 | 31.7 | 28.0–35.7 | 3,559 | 36.3 | 34.9–37.7 | ||||
| Other substance use | ||||||||||
| Yes | 40 | 70.9 | 58.4–80.8 | 47 | 50.2 | 40.6–59.7 | 2.41 (1.24–4.67) | <0.001 | 1.57 (0.66–3.72) | 0.29 |
| No | 20 | 29.1 | 19.2–41.6 | 49 | 49.8 | 10.3–59.4 | ||||
N, unweighted; %, weighted; CI, confidence interval.
a)Early puberty group: Male adolescents who underwent first nocturnal ejaculation when they were in grade 4 or earlier (≤grade 4). b)Normal puberty group: Male adolescents who underwent first nocturnal ejaculation when they were in grade 5 or later (≥grade 5). c)OR, odds ratio (adjusted for sociodemographic variables of paternal educational level, maternal educational level, living with both parents, academic performance, and household income).