Table 1: Maternal Characteristics of Case and Control Mothers with Epilepsy and without Epilepsy as Reference

Variables Case Mothers Control Mothers
without Epilepsy (N=22,748) with Epilepsy (N=95) without Epilepsy (N=38,061) with Epilepsy (N=90)
Quantitative No. % No. % No. % No. %
Maternal age, yr.
- 19 2,494 11.0 12 12.6 3,271 8.6 6 6.7
20 – 29 15,525 68.2 68 71.6 27,531 72.3 71 78.9
30 - 4,729 20.8 15 15.8 7,259 19.1 13 14.4
Mean ± S.D. 25.5 ± 5.3 24.6 ± 4.6 25.5 ± 4.9 24.9 ± 4.5
Birth order
1 10,654 46.8 54 56.8 18,156 47.7 53 58.9
2 or more 12,094 53.2 41 43.2 19,905 52.3 37 41.1
Mean ± S.D. 1.9 ± 1.1 1.6 ± 0.8 1.7 ± 0.9 1.7 ± 1.2
Categorical No. % No. % No. % No. %
Unmarried 1,258 5.5 11 11.6 1,462 3.8 10 11.1
Employment status
Professional 1,972 8.7 5 5.3 4,418 11.6 5 5.6
Managerial 5,078 22.3 19 20.0 10,245 26.9 20 22.2
Skilled worker 6,479 28.5 22 23.2 11,885 31.2 23 25.6
Semiskilled worker 4,178 18.4 19 20.0 6,145 16.1 16 17.8
Unskilled worker 1,766 7.8 10 10.5 2,177 5.7 10 11.1
Housewife 2,398 10.5 8 8.4 2,343 6.2 11 12.2
Others 877 3.9 12 12.6 848 2.2 5 5.6
Pregnancy supplements
Iron 14,688 64.6 54 56.8 26,716 70.2 55 61.1
Calcium 1,799 7.9 4 4.2 3,578 9.4 5 5.6
Folic acid 11,245 49.4 34 35.8 20,731 54.5 44 48.9
Vitamin D 6,084 26.7 17 17.9 10,133 26.6 17 18.9
Multivitamins 1,325 5.8 5 5.3 2,500 6.6 9 10.0

Pregnancy order
1 10,654 46.8 50 52.6 18,156 47.7 47 52.2
2 or more 12,094 53.2 45 47.4 19,905 52.3 43 47.7
Mean ± S.D 2.1±1.4 2.0±1.3 1.9±1.2 2.0±1.3