Table 5.
< 14.4% Black residents (n= 1,299) |
14.4 – 82.7% Black residents (n= 2,592) |
> 82.7% Black residents (n= 1,291) |
|||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Relative household income | No. term |
No. preterm |
Odds ratio |
95% confidence interval |
No. term |
No. preterm |
Odds ratio |
95% confidence interval |
No. Term |
No. preterm |
Odds ratio |
95% confidence interval |
p valueb |
All preterm birth | |||||||||||||
Higher income | 634 | 104 | 0.71 | 0.50, 1.00 | 1446 | 237 | 1.04 | 0.78, 1.37 | 706 | 136 | 1.80 | 1.14, 2.82 | 0.002 |
Similar income c | 292 | 68 | 1.00 | Referent | 474 | 78 | 1.00 | Referent | 228 | 27 | 1.00 | Referent | |
Lower income | 171 | 30 | 0.80 | 0.48, 1.32 | 295 | 62 | 1.21 | 0.83, 1.76 | 162 | 32 | 1.61 | 0.92, 2.82 | 0.03 |
Spontaneous preterm birth | |||||||||||||
Higher income | 634 | 53 | 0.69 | 0.43, 1.09 | 1446 | 124 | 1.02 | 0.70, 1.48 | 706 | 74 | 1.96 | 1.07, 3.59 | 0.01 |
Similar income | 292 | 35 | 1.00 | Referent | 474 | 41 | 1.00 | Referent | 228 | 14 | 1.00 | Referent | |
Lower income | 171 | 14 | 0.67 | 0.34, 1.34 | 295 | 28 | 1.09 | 0.65, 1.82 | 162 | 19 | 1.87 | 0.90, 3.89 | 0.03 |
Medically indicated preterm birth | |||||||||||||
Higher income | 634 | 51 | 0.74 | 0.46, 1.18 | 1446 | 113 | 1.05 | 0.71, 1.55 | 706 | 62 | 1.62 | 0.86, 3.05 | 0.04 |
Similar income | 292 | 33 | 1.00 | Referent | 474 | 37 | 1.00 | Referent | 228 | 13 | 1.00 | Referent | |
Lower income | 171 | 16 | 0.98 | 0.50, 1.93 | 295 | 34 | 1.32 | 0.80, 2.19 | 162 | 13 | 1.35 | 0.60, 3.04 | 0.24 |
Adjusted for age, education, marital status, body mass index, and smoked cigarettes during pregnancy.
p value for interaction term between higher or lower relative household income and % Black residents (ordinal).
Similar income is defined as no difference in category of household income for the participant with that of her block group.