Table 1.
Demographic Characteristics of the Sample
| Characteristic | Category | Cases (n = 111) | Controls (n = 333) | Analysis P Value |
|---|---|---|---|---|
| Female | N (%) | 47 (42.34%) | 141 (42.34%) | 1.00 |
| Birth weight (grams) | Mean (SD) | 3074.6 (523.2) | 3130.7 (515.39) | .323 |
| Gestational age (weeks)a | Mean (SD) | 38.77 (4.81) | 39.01 (3.65) | .595 |
| Mother’s agea | Mean (SD) | 24.17 (6.90) | 24.17 (6.14) | .994 |
| Previous pregnanciesa | Mean (SD) | 2.71 (2.66) | 2.61 (2.64) | .717 |
| Maternal social statusa | Mean (SD) | 36.1 (18.6) | 40.7 (15.5) | .01 |
| Mother’s education (years)a | Mean (SD) | 9.97 (2.02) | 10.33 (2.18) | .13 |
| African American | N (%) | 103 (92.79%) | 308 (92.49%) | .917 |
| Influenza B | N (%) | 35 (31.53%) | 80 (24.02%) | .118 |
| Moderate fetal hypoxia (75th percentile) | N (%) | 15 (13.51%) | 48 (14.41%) | .32 |
| Severe fetal hypoxia (90th percentile) | N (%) | 4 (3.60%) | 21 (6.31%) | .95 |
aInformation was incomplete for 10 subjects on gestational age, for 8 subjects on maternal age, for 8 subjects on previous pregnancies, for 18 subjects on maternal social status, and for 11 subjects on maternal education.