Table 1. Demographic and other characteristics of cases and non-cases of pandemic influenza illness, as ascertained from child’s birth certificate.
| Characteristics of women | Women with confirmed pH1N1 illness during pregnancy, n (%) | Women without confirmed pH1N1 illness during pregnancy, n (%) | Unadjusted OR (95% CI) |
|---|---|---|---|
| Total pregnant women | 187 | 295,747 | |
| Race | |||
| Non-white | 95 (51) | 112,968 (38) | 1.67 (1.25-2.23) |
| white | 92 (49) | 182,779 (62) | 1.0 (ref) |
| Ethnicity | |||
| Hispanic or Haitian | 86 (47) | 94,253 (32) | 1.88 (1.41-2.52) |
| Not Hispanic or Haitian | 96 (53) | 198,249 (68) | 1.0 (ref) |
| Foreign born | |||
| yes | 69 (37) | 92,053 (31) | 1.29 (0.96-1.74) |
| no | 118 (63) | 203,694 (69) | 1.0 (ref) |
| Age at delivery of child | |||
| ≤ 25 | 104 (56) | 117,923 (40) | 1.89 (1.42-2.52) |
| >25 | 83 (44) | 177,800 (60) | 1.0 (ref) |
| Mean | 25.9 | 27.6 | p<0.01* |
| Marital status | |||
| single | 115 (62) | 139,315 (47) | 1.79 (1.34-2.41) |
| married | 72 (38) | 156,337 (53) | 1.0 (ref) |
| Education | |||
| High school graduate or less | 123 (68) | 144,650 (49) | 2.16 (1.58-2.94) |
| High school education | 59 (32) | 149,734 (51) | 1.0 (ref) |
| Pre-pregnancy BMI | |||
| <18.5 | 5 (3) | 12,065 (4) | 0.77 (0.31-1.90) |
| 18.5-24.9 | 74 (44) | 136,848 (50) | 1.0 (ref) |
| 25.0-29.9 | 41 (25) | 69,260 (25) | 1.10 (0.75-1.60) |
| ≥ 30.0 | 46 (28) | 56,194 (21) | 1.51 (1.05-2.19) |
| Mean | 26.9 | 25.7 | p<0.01* |
| Principle source of payment | |||
| Medicaid | 112 (60) | 140,680 (48) | 1.63 (1.22-2.18) |
| Private insurance, self, or other | 75 (40) | 153,592 (52) | 1.0 (ref) |
| Received WIC food | |||
| Yes | 126 (68) | 154,191 (53) | 1.95 (1.43-2.66) |
| No | 58 (32) | 138,090 (47) | 1.0 (ref) |
| Residence in city limits | |||
| Yes | 155 (83) | 210,535 (72) | 1.95 (1.33-2.87) |
| No | 31 (17) | 82,161 (28) | 1.0 (ref) |
| Previous live births | |||
| Yes | 127 (68) | 168,940 (57) | 1.59 (1.17-2.16) |
| No | 60 (32) | 126,807 (43) | 1.0 (ref) |
| >2 Other children (live births) | |||
| Yes | 28 (15) | 29,028 (10) | 1.62 (1.08-2.42) |
| No | 159 (85) | 266,719 (90) | 1.0 (ref) |
| Multiple gestation | |||
| Multiple | 4 (2) | 5064 (2) | 1.26 (0.47-3.38) |
| Single | 183 (98) | 290,666 (98) | 1.0 (ref) |
* t-test, pooled variance