Table 1 Number of children according to parental characteristics and maternal occupational status and organic solvent exposure in pregnancy.
| Characteristic | Any occupation | Shift work | Solvents <TLV* | Solvents ⩾TLV* | ||||
|---|---|---|---|---|---|---|---|---|
| n | %† | n | %† | n | %† | n | %† | |
| All | 6418 | 100 | 926 | 100 | 479 | 100 | 20 | 100 |
| Socioeconomic group‡ | ||||||||
| Academic/managerial | 3135 | 48.9 | 463 | 50.0 | 160 | 34.0 | 0 | – |
| Non‐academic | 3280 | 51.1 | 463 | 50.0 | 309 | 65.7 | 20 | 100 |
| Maternal education | ||||||||
| Primary school or lower | 691 | 10.8 | 92 | 9.9 | 75 | 16.0 | 7 | 35.0 |
| Lower secondary school | 3132 | 48.8 | 377 | 40.7 | 249 | 53.0 | 13 | 65.0 |
| Upper secondary school or higher | 2578 | 40.2 | 455 | 49.1 | 145 | 30.9 | 0 | – |
| Maternal age | ||||||||
| 15–24 | 1528 | 23.8 | 172 | 18.6 | 165 | 35.1 | 7 | 35.0 |
| 25–29 | 2877 | 44.8 | 477 | 51.5 | 196 | 41.7 | 6 | 30.0 |
| 30+ | 2011 | 31.3 | 277 | 29.9 | 109 | 23.2 | 7 | 35.0 |
| Maternal smoking | ||||||||
| Yes | 2563 | 39.9 | 387 | 41.8 | 203 | 43.2 | 12 | 60.0 |
| No | 3833 | 59.7 | 537 | 58.0 | 262 | 55.7 | 8 | 40.0 |
| Maternal parity | ||||||||
| 0 | 3128 | 48.7 | 508 | 54.9 | 250 | 53.2 | 14 | 70.0 |
| 1 | 2475 | 38.6 | 312 | 33.7 | 179 | 38.1 | 4 | 20.0 |
| 2+ | 815 | 12.7 | 106 | 11.5 | 41 | 8.7 | 2 | 10.0 |
The groupings of maternal occupational status into any occupation, shift work, and solvent exposure are not mutually exclusive. For categorisation of covariates used in the analyses, see Methods.
*Most likely exposure, at time weighted average, in relation to Danish threshold limit values (TLVs).
†Percentages might not add up to 100% due to missing information.
‡Socioeconomic group was classified according to the parent having the highest socioeconomic group; academic/managerial includes group 1–3 and non‐academic group 4–7.