Table 2.
Characteristics of infection stillbirths and live births by gestational age
| Variable | < 37 Weeks Gestation | ≥ 37 Weeks Gestation | ||||
|---|---|---|---|---|---|---|
| Infection-related Stillbirths * Nw = 55 N = 54 (%) | Livebirths * Nw = 155 N = 485 (%) | P-value | Infection-related Stillbirths * Nw = 10 N = 10 (%) | Livebirths * Nw = 1285 N = 1447 (%) | P-value | |
| Maternal age (years) | 0.052 | 0.132† | ||||
| <20 | 3 (6) | 16 (10.1) | 2 (20) | 133 (10.3) | ||
| 20-34 | 47 (85) | 120 (77.5) | 6 (60) | 969 (75.4) | ||
| 35-39 | 4 (7) | 15 (9.6) | 1 (10) | 157 (12.2) | ||
| 40+ | 1 (2) | 4 (2.8) | 1 (10) | 26 (2.1) | ||
| Maternal race/ethnicity | <.001 | 0.040† | ||||
| White, non-Hispanic | 8 (14) | 57 (36.6) | 4 (40) | 603 (46.9) | ||
| Black, non-Hispanic | 28 (52) | 25 (16.5) | 4 (40) | 143 (11.2) | ||
| Hispanic | 13 (25) | 64 (41.3) | 1 (10) | 438 (34.1) | ||
| Other | 5 (9) | 9 (5.6) | 1 (10) | 101 (7.8) | ||
| Missing | 1 | 0 | 0 | 0 | ||
| Body mass index (kg/m2) | 0.593† | 0.375† | ||||
| <30 | 34 (64) | 100 (70.9) | 10 (100) | 964 (77.2) | ||
| 30-39 | 16 (31) | 31 (22.2) | 0 (0) | 220 (17.6) | ||
| 40-49 | 2 (4) | 8 (5.3) | 0 (0) | 56 (4.4) | ||
| 50+ | 1 (1) | 2 (1.6) | 0 (0) | 10 (0.8) | ||
| Missing | 2 | 14 | 0 | 35 | ||
| Chronic hypertension | 0.853 | 0.999† | ||||
| Yes | 5 (9) | 18 (11.7) | 0 (0) | 69 (5.4) | ||
| No | 50 (91) | 136 (88.3) | 10 (100) | 1206 (94.6) | ||
| Missing | 0 | 1 | 0 | 10 | ||
| Preeclampsia/gestational hypertension | 0.002 | 0.999† | ||||
| Yes | 4 (8) | 31 (21.3) | 0 (0) | 91 (7.3) | ||
| No | 47 (92) | 116 (78.7) | 10 (100) | 1152 (92.7) | ||
| Missing | 4 | 8 | 0 | 42 | ||
| Pregestational diabetes | 0.684† | 0.118† | ||||
| Yes | 1 (2) | 7 (4.7) | 1 (10) | 15 (1.2) | ||
| No | 54 (98) | 147 (95.3) | 9 (90) | 1258 (98.8) | ||
| Missing | 0 | 1 | 0 | 12 | ||
| Gestational diabetes | 0.450† | 0.557† | ||||
| Yes | 1 (2) | 8 (5.4) | 1 (10) | 98 (7.8) | ||
| No | 54 (98) | 145 (94.6) | 9 (90) | 1162 (92.2) | ||
| Missing | 0 | 2 | 0 | 25 | ||
| Insurance/method of payment | 0.101 | 0.676† | ||||
| No Insurance | 3 (6) | 6 (4.1) | 0 (0) | 45 (3.5) | ||
| Any Public/private assistance | 32 (59) | 99 (64.1) | 6 (60) | 600 (46.8) | ||
| Veterans Affairs/commercial health insurance/health maintenance organization (HMO) | 19 (35) | 49 (31.8) | 4 (40) | 638 (49.7) | ||
| Missing | 1 | 1 | 0 | 2 | ||
| Maternal education | 0.545 | 0.470† | ||||
| 0-11 (none, primary, some secondary) | 12 (23) | 31 (21.9) | 3 (40) | 219 (17.9) | ||
| 12 (completed secondary) | 17 (33) | 53 (37.3) | 1 (10) | 299 (24.5) | ||
| 13+ (college) | 23 (44) | 58 (40.8) | 5 (50) | 702 (57.6) | ||
| Missing | 3 | 13 | 1 | 65 | ||
| Tobacco use | 0.176† | 0.481† | ||||
| None | 43 (82) | 125 (87.9) | 7 (90) | 1060 (86.6) | ||
| <10 cigarettes/day | 8 (15) | 9 (6.3) | 1 (10) | 79 (6.5) | ||
| 10+ cigarettes /day | 2 (3) | 8 (5.8) | 0 (0) | 84 (6.9) | ||
| Missing | 2 | 13 | 2 | 62 | ||
| Lifetime drug use | 0.494 | 0.530† | ||||
| Never used | 31 (60) | 94 (70.1) | 7 (90) | 840 (69.2) | ||
| Ever used, without addiction | 17 (32) | 36 (26.7) | 1 (10) | 350 (28.8) | ||
| Ever used, with addiction | 4 (8) | 4 (3.2) | 0 (0) | 24 (2) | ||
| Missing | 3 | 21 | 2 | 71 | ||
*
Nw represents weighted N, column percentages are displayed,
†
Fisher’s Exact Test