Women's characteristics by fertility impairment status
| Female fertility impairment | |||
|---|---|---|---|
| No | Yes | ||
| (n=6820) | (n=652) | p Value | |
| Age (years) | |||
| 18–24 | 1490 (21.8) | 87 (11.9) | |
| 25–29 | 2101 (30.8) | 189 (25.8) | |
| 30–34 | 2173 (31.9) | 265 (36.2) | |
| 35–39 | 897 (13.2) | 149 (20.4) | |
| ≥40 | 159 (2.3) | 41 (5.6) | <0.001 |
| Education (years) | |||
| ≤6 | 1539 (22.6) | 182 (27.9) | |
| 7–9 | 1745 (25.6) | 179 (27.4) | |
| 10–12 | 1850 (27.1) | 167 (25.6) | |
| >12 | 1686 (24.7) | 124 (19.0) | 0.001 |
| Single women | 394 (5.8) | 18 (2.8) | 0.001 |
| Monthly income (€) | |||
| ≤1000 | 2456 (40.0) | 253 (41.3) | |
| 1001–2000 | 2711 (44.2) | 268 (43.8) | |
| >2000 | 971 (15.8) | 91 (14.9) | 0.748 |
| Not known/no answer | 10.0 | 6.1 | |
| Occupation | 0.178 | ||
| Higher level white-collar | 1607 (23.6) | 136 (20.9) | |
| Lower level white-collar | 3281 (48.1) | 310 (47.6) | |
| Skilled blue-collar | 876 (12.8) | 104 (16.0) | |
| Unskilled blue-collar | 622 (9.1) | 60 (9.2) | |
| No occupation | 434 (6.4) | 42 (6.4) | |
| Employment status | |||
| Employed | 4942 (72.6) | 471 (74.2) | |
| Unemployed | 1316 (19.3) | 131 (20.1) | |
| Housewife | 405 (6.0) | 46 (7.1) | |
| Student | 127 (1.9) | 4 (0.6) | |
| Other | 19 (0.3) | 0 (0.0) | 0.074 |
| Planned pregnancy | 4482 (65.8) | 531 (81.4) | <0.001 |
| Previous pregnancies | |||
| None | 3227 (47.3) | 268 (41.1) | |
| One or more | 3593 (52.7) | 384 (58.9) | 0.002 |
| From the same father | 2901 (81.8) | 318 (84.6) | 0.177 |
| With live birth | 2990 (84.7) | 302 (80.1) | 0.020 |
| Age at menarche (years) | |||
| ≤11 | 1708 (25.3) | 181 (28.0) | |
| 12 | 2049 (30.4) | 162 (25.1) | |
| 13 | 1520 (22.5) | 149 (23.1) | |
| >13 | 1468 (21.8) | 154 (23.8) | 0.038 |
| Age at first sexual intercourse (years) | |||
| ≤15 | 344 (7.4) | 36 (8.6) | |
| 16–17 | 1239 (26.6) | 115 (27.3) | |
| 18–19 | 1630 (35.0) | 129 (30.6) | |
| 20–24 | 1152 (24.8) | 117 (27.8) | |
| ≥25 | 286 (6.2) | 24 (5.7) | 0.349 |
| Regular menstrual cycles | 5618 (83.4) | 417 (64.6) | <0.001 |
| Self-reported health status before pregnancy | |||
| Poorer or fair | 990 (14.6) | 101 (15.6) | |
| Good | 3666 (54.1) | 362 (56.0) | |
| Very good | 930 (13.7) | 80 (12.4) | |
| Excellent | 1194 (17.6) | 104 (16.1) | 0.496 |
| Pre-pregnancy body mass index (kg/m2) | |||
| <180 | 267 (4.0) | 16 (2.5) | |
| 180–24.9 | 4391 (66.2) | 361 (56.6) | |
| 250–29.9 | 1405 (21.2) | 175 (27.4) | |
| ≥300 | 574 (8.6) | 86 (13.5) | <0.001 |
| Smoking status 3 months before pregnancy | |||
| Never-smoker | 4212 (62.3) | 400 (61.7) | |
| Ex-smoker | 768 (11.4) | 72 (11.1) | |
| 1–14 cigarettes/day | 952 (14.1) | 96 (14.8) | |
| ≥15 cigarettes/day | 824 (12.2) | 80 (12.4) | 0.960 |
| n=5280 | n=507 | ||
| Infection* | 83 (1.6) | 9 (1.8) | 0.727 |
*Positive result for syphilis (Venereal Disease Research Laboratory), hepatitis B (HBsAg), hepatitis C (Anti-HCV) or HIV.