Table 4 Distribution of Confounders by OC Exposure for Each Time of Unprotected Intercourse in Female Offspringa
|  | Total (n = 252) | In utero exposure to PCB (μg/L) | In utero exposure to DDE (μg/L) | ||||||
|---|---|---|---|---|---|---|---|---|---|
(0–2.4) (n = 144) | (2.5–7.4) (n = 66) | (≥7.5) (n = 44) | P ≤ 0.05 (χ2) | (0–2.4) (n = 101) | (2.5–7.4) (n = 89) | (≥7.5) (n = 62) | P ≤ 0.05 (χ2) | ||
Age at TUI: | |||||||||
 14–20 year | 8.3 | 11.1 | 4.6 | 4.8 |  | 10.9 | 10.4 | 1.6 |  |
 20.1–25 years | 18.3 | 18.8 | 6.1 | 35.7 |  | 13.9 | 21.8 | 21.0 |  |
 25.1–30 year | 38.9 | 35.4 | 50.0 | 33.3 |  | 42.6 | 28.7 | 46.8 |  |
  > 30 year | 34.5 | 34.7 | 39.4 | 26.2 | a | 32.7 | 39.1 | 30.7 | a |
Cigarette smoking (yes) | 30.3 | 29.9 | 25.8 | 38.6 | Â | 31.7 | 25.8 | 35.5 | Â |
Offspring’s partner smoking (yes) | 32.3 | 30.1 | 31.8 | 39.5 |  | 35.6 | 26.4 | 35.8 |  |
Caffeine Intake/day | |||||||||
 0–100 mg | 46.1 | 47.9 | 39.4 | 50.0 |  | 46.5 | 52.8 | 33.9 |  |
 101–300 mg | 27.6 | 23.6 | 40.9 | 20.5 |  | 30.7 | 16.7 | 38.7 |  |
  > 300 mg | 26.4 | 28.5 | 19.7 | 29.6 |  | 22.8 | 30.3 | 27.4 | a |
Alcohol intake (drinks/day) | |||||||||
 no | 44.9 | 42.4 | 50.0 | 45.5 |  | 44.6 | 49.4 | 38.7 |  |
 0.01–0.5 | 36.6 | 36.1 | 43.9 | 27.3 |  | 35.6 | 33.7 | 41.9 |  |
  > 0.5 | 18.5 | 21.5 | 6.1 | 27.3 | a | 19.8 | 16.9 | 19.4 |  |
Pelvic and genital infections before TUI (yes) | 62.6 | 60.4 | 63.6 | 68.2 | Â | 57.4 | 56.2 | 79.0 | a |
Offspring’s Education | |||||||||
 High school | 9.5 | 9.0 | 9.1 | 11.4 |  | 6.9 | 16.9 | 3.2 |  |
 Associate degree | 32.7 | 37.5 | 21.2 | 34.1 |  | 34.7 | 30.3 | 33.9 |  |
 Graduate and more | 57.9 | 53.5 | 69.7 | 54.6 |  | 58.4 | 52.8 | 62.9 |  |
Sexual frequency | |||||||||
 1–14times/month | 75.3 | 75.5 | 69.4 | 82.8 |  | 72.9 | 83.6 | 71.4 |  |
  > 14times/month | 24.7 | 24.5 | 30.6 | 17.2 |  | 27.1 | 16.4 | 28.6 |  |
Planning a baby | |||||||||
 yes | 79.2 | 73.2 | 89.4 | 83.3 |  | 69.3 | 85.9 | 87.1 |  |
 no | 20.8 | 26.8 | 10.6 | 16.7 | a | 30.7 | 14.1 | 12.9 | a |