Characteristics of study participants (monotherapy and polytherapy combined)
| Characteristics | Exposed to AED N=2906 | Not exposed to AED N=674 115 | ||
|---|---|---|---|---|
| (n) | (%) | (n) | (%) | |
| Smoking | ||||
| Yes | 780 | (26.8) | 125 863 | (18.7) |
| No | 1981 | (68.2) | 527 907 | (78.3) |
| Missing | 145 | (5.0) | 20 345 | (3.0) |
| Maternal age (years) | ||||
| <21 | 83 | (2.9) | 17 991 | (2.7) |
| 21–25 | 476 | (16.4) | 102 276 | (15.2) |
| 26–30 | 1044 | (35.9) | 257 147 | (38.1) |
| 31–35 | 895 | (30.8) | 214 628 | (31.8) |
| ≥36 | 408 | (14.0) | 82 072 | (12.2) |
| Missing | 0 | (0.0) | 1 | (0.0) |
| Parity | ||||
| 0 | 1367 | (47.0) | 288 334 | (42.8) |
| ≥1 | 1538 | (52.9) | 385 402 | (57.2) |
| Missing | 1 | (0.0) | 379 | (0.1) |
| Cohabitation | ||||
| Yes | 2222 | (76.5) | 553 987 | (82.2) |
| No | 670 | (23.1) | 114 150 | (16.9) |
| Missing | 14 | (0.5) | 5978 | (0.9) |
| Income (%)* | ||||
| 0–19 | 624 | (21.5) | 118 703 | (17.6) |
| 20–39 | 805 | (27.7) | 134 876 | (20.0) |
| 40–59 | 600 | (20.6) | 139 171 | (20.6) |
| 60–79 | 510 | (17.5) | 141 922 | (21.1) |
| 80–100 | 367 | (12.6) | 138 736 | (20.6) |
| Missing | 0 | (0.0) | 707 | (0.1) |
| Maternal education (years) | ||||
| <10 | 411 | (14.1) | 57 956 | (8.6) |
| 10–12 | 1066 | (36.7) | 197 633 | (29.3) |
| >12 | 1365 | (47.0) | 402 117 | (59.7) |
| Missing | 64 | (2.2) | 16 409 | (2.4) |
| Substance abuse | ||||
| Yes | 106 | (3.6) | 2284 | (0.3) |
| No | 2800 | (96.4) | 671 831 | (99.7) |
| Missing | 0 | (0.0) | 0 | (0.0) |
*The annual income was divided into quintiles (0–19%, 20–39%, 40–59%, 60–79%, 80–100%).
AED, antiepileptic drug.