Delivery outcomes among 6960 infants born to 3706 Swedish hairdressers (All) and 6629 infants born to 3462 women from the general population (Referents); delivery outcomes are also presented for the subgroup of hairdressers (Questionnaire; 2410 women) that answered a questionnaire regarding occupational exposure
| Hairdressers | |||
|---|---|---|---|
| All n (%) | Questionnaire n (%) | Referents n (%) | |
| *Excluding minor malformations such as preauricular appendices, undescended testicles, unstable hip, and nevus. | |||
| Gender (boys) | 3601 (51.7) | 2317 (51.9) | 3332 (50.3) |
| Low birth weight (<2.5 kg) | 309 (4.5) | 190 (4.3) | 274 (4.1) |
| Preterm birth (<37 weeks) | 446 (6.4) | 281 (6.3) | 410 (6.2) |
| Small for gestational age | 247 (3.6) | 162 (3.6) | 188 (2.9) |
| Stillbirths | 29 (0.4) | 0 (0) | 26 (0.4) |
| Early neonatal deaths (<7 days) | 23 (0.3) | 13 (0.3) | 13 (0.2) |
| All malformations | 327 (4.7) | 204 (4.6) | 290 (4.4) |
| Major malformations* | 195 (2.8) | 124 (2.8) | 142 (2.1) |