Characteristics | Normotensive group N = 18,565 | Gestational hypertension N = 105 | Preeclampsia N = 88 | Mg-preeclampsia N = 77 |
---|---|---|---|---|
Maternal age (years) | ||||
 15–24 | 542 (2.9) | 3 (2.8) | 4 (4.5) | 0 (0) |
 25–34 | 14,564 (78.4) | 70 (66.7)a | 65 (73.9) | 57 (74.0) |
 35–44 | 3459 (18.7) | 32 (30.5)a | 19 (21.6) | 20 (26.0) |
Paid employment | 5309 (28.6) | 32 (30.5) | 23 (26.1) | 22 (28.6) |
Nulliparity | 10,551 (56.8) | 69 (65.7) | 67 (76.1)a | 53 (68.8)a |
Multiple gestation | 268 (1.4) | 2 (1.9) | 7 (8.0)a | 7 (9.1)a, b |
Diagnosis of diabetes | 297 (1.6) | 8 (7.6)a | 7 (8.0)a | 7 (9.1)a |
Household income (%) | ||||
 0–40 | 3509 (18.9) | 27 (25.7)a | 14 (15.9) | 16 (20.8) |
 40–70 | 7607 (41.0) | 51 (48.6)a | 42 (47.7) | 38 (49.3) |
 70–100 | 7449 (40.1) | 27 (25.7)a | 32 (36.4) | 23 (29.9) |
Birth season | ||||
 Spring | 4689 (25.3) | 34 (32.4) | 22 (25.0) | 22 (28.6) |
 Summer | 4288 (23.1) | 22 (21.0) | 17 (19.3) | 23 (29.9) |
 Fall | 4916 (26.5) | 27 (25.7) | 30 (34.1) | 18 (23.3) |
 Winter | 4672 (25.1) | 22 (21.0) | 19 (21.6) | 14 (18.2) |
PM10 (μg/m3) for four exposure periods | ||||
 12 months to birth | 57.78 ± 10.31 | 54.72 ± 10.40a | 58.08 ± 11.57 | 58.15 ± 9.81b |
 6 months | 56.23 ± 13.56 | 54.11 ± 13.75 | 54.64 ± 14.11 | 55.84 ± 13.22 |
 3 months | 56.34 ± 16.68 | 54.15 ± 15.58 | 52.72 ± 14.80a | 56.56 ± 16.99 |
 1 month | 56.68 ± 20.40 | 53.12 ± 16.58 | 52.95 ± 17.79 a | 53.40 ± 17.64 |
NO2 (ppb) | ||||
 12 months | 35.33 ± 4.42 | 34.10 ± 4.51a | 35.07 ± 4.97 | 36.31 ± 4.38b |
 6 months | 35.12 ± 5.85 | 33.99 ± 5.38a | 34.51 ± 6.27 | 36.02 ± 5.84b |
 3 months | 35.19 ± 7.22 | 34.30 ± 6.50 | 34.41 ± 7.09 | 35.43 ± 7.82 |
 1 month | 35.33 ± 8.47 | 33.70 ± 7.07a | 35.13 ± 7.54 | 34.62 ± 9.52 |
CO (100Â ppb) | ||||
 12 months | 76.16 ± 14.45 | 73.13 ± 13.80a | 77.34 ± 16.43 | 77.65 ± 12.13b |
 6 months | 75.20 ± 18.93 | 72.23 ± 17.41 | 75.42 ± 19.83 | 77.27 ± 19.58 |
 3 months | 75.28 ± 23.28 | 72.72 ± 19.94 | 74.41 ± 22.76 | 76.03 ± 23.92 |
 1 month | 75.24 ± 25.85 | 70.69 ± 21.54 | 73.12 ± 23.17 | 74.24 ± 29.24 |
SO2 (ppb) | ||||
 12 months | 5.25 ± 1.06 | 5.12 ± 0.90 | 5.35 ± 1.10 | 5.18 ± 1.09 |
 6 months | 5.24 ± 1.43 | 5.11 ± 1.24 | 5.20 ± 1.47 | 5.31 ± 1.57 |
 3 months | 5.27 ± 1.74 | 5.26 ± 1.53 | 5.21 ± 1.81 | 5.17 ± 1.77 |
 1 month | 5.29 ± 1.99 | 5.17 ± 1.56 | 5.35 ± 1.96 | 4.97 ± 2.15 |
O3 (ppm) | ||||
 12 months | 29.74 ± 4.93 | 31.33 ± 4.28 | 29.51 ± 5.11b | 29.49 ± 5.21b |
 6 months | 29.54 ± 8.90 | 29.87 ± 8.39 | 29.56 ± 9.67 | 28.55 ± 9.12 |
 3 months | 29.36 ± 11.40 | 29.62 ± 10.46 | 28.20 ± 10.76 | 30.67 ± 11.98 |
 1 month | 29.54 ± 12.86 | 30.37 ± 11.92 | 27.71 ± 11.04 | 31.70 ± 13.94 |