Table 1: Maternal Characteristics in the Study Groups

Variables Pregnant Women
Without PE Without VET (N=34,928) Without PE with VET (N=2,206) With PE With VET (N=81) With PE Without VET (N=936) With PE With/Without VET (N=1,017)
Quantitative No. % No. % No. % No. % No. %
Maternal age (yr) 19 or less 3,055 8.7 136 6.2 5 6.2 81 8.7 86 8.5
20-29 25,263 72.3 1,615 73.2 53 65.4 672 71.7 725 71.2
30 or more  6,610 18.9 455 20.6 23 28.4 183 19.7 206 20.3
Mean ± S.D. 25.4  4.9 25.7 4.9 26.5 5.3 25.4 4.9 25.5 5.0
Birth order 1 16,387 46.9 1,218 55.2 48 59.3 658 64.7 706 69.4
2 or more 18,641 53.1 988 44.8 33 40.7 278 29.7 392 38.5
Mean ± S.D. 1.8 0.9 1.6 0.8 1.4 0.9 1.4 0.9 1.4 0.9
Pregnancy order 1 14,859 42.5 921 41.7 39 48.1 501 53.5 540 53.1
2 or more 20,069 57.5 1,285 58.3 42 51.9 435 46.5 477 46.9
Mean ± S.D. 1.9 1.2 2.0 1.2 1.8 1.0 1.8 1.2 1.8 1.2
Categorical No. % No. % No. % No. % No. %
Unmarried 1,380 4.0 63 2.9 2 2.5 27 2.9 29 2.9
Employment status
Professional 4,072 11.7 259 11.7 10 12.3  83  8.9  93  9.1
Managerial  9,291 26.6 669 30.3 31 38.3 274 29.3 305 30.0
Skilled worker 10,841 31.0 711 32.2 23 28.4 334 35.7 357 35.1
Semiskilled worker  5,626 16.1 372 16.9 11 13.6 152 16.2 163 16.0
Unskilled worker  2,040  5.8 100  4.5  2  2.5  45  4.8 47  4.6
Housewife 2,245 6.4 67 3.0 4 4.9 36 3.9 40 3.9
Others 813 2.3 28 1.3 0 0.0 12 1.3 12 1.2
Pregnancy supplements
Iron 24,264 69.5 1,772 80.3 68 84.0 670 71.6 738 72.6
Calcium 3,276 9.4 217 9.8 9 11.1 81 8.7 90 8.8
Folic acid 18,850 54.0 1,345 61.0 54 66.7 526 56.2 580 57.0
Vitamin C 1,266 3.6 355 16.1 17 21.0 47 5.0 64 6.3
Multivitamins 2,270 6.5 ;176 8.0 6 ;7.4 ;57 6.1 63 57.0