From: Area-level risk factors for adverse birth outcomes: trends in urban and rural settings
 | Population density | ||
---|---|---|---|
 | 1sttertile | 2ndtertile | 3rdtertile |
Model 1: Poverty*population density (interaction P-value = 0.0043) | |||
 1st quartile | 1.00 | 1.00 | 1.00 |
 2nd quartile | 1.09 (0.99, 1.20) | 1.00 (0.92, 1.09) | 1.18 (1.04, 1.35) |
 3rd quartile | 1.12 (1.02, 1.23) | 1.05 (0.95, 1.16) | 1.30 (1.13, 1.49) |
 4th quartile | 1.22 (1.11, 1.34) | 1.08 (0.95, 1.23) | 1.48 (1.34, 1.64) |
Model 2: Poverty*population density (interaction P-value = 0.0015) | |||
 1st quartile | 1.00 | 1.00 | 1.00 |
 2nd quartile | 1.09 (1.00, 1.18) | 0.96 (0.89, 1.03) | 1.07 (0.96, 1.20) |
 3rd quartile | 1.06 (0.98, 1.15) | 0.96 (0.88, 1.04) | 1.08 (0.97, 1.22) |
 4th quartile | 0.99 (0.91, 1.08) | 0.88 (0.78, 0.98) | 1.14 (1.04, 1.24) |
Model 1: African American*population density (P-value = 0.0084) | |||
 1st quartile | 1.00 | 1.00 | 1.00 |
 2nd quartile | 1.06 (0.99, 1.13) | 0.98 (0.91, 1.06) | 0.99 (0.83, 1.19) |
 3rd quartile | 1.15 (1.07, 1.23) | 1.08 (0.99, 1.18) | 1.22 (1.03, 1.45) |
 4th quartile | 1.27 (1.19, 1.36) | 1.35 (1.18, 1.56) | 1.54 (1.31, 1.81) |
Model 2: African American*population density (P-value = 0.071) | |||
 1st quartile | 1.00 | 1.00 | 1.00 |
 2nd quartile | 1.00 (0.95, 1.07) | 0.94 (0.88, 1.01) | 0.96 (0.81, 1.13) |
 3rd quartile | 1.00 (0.94, 1.07) | 0.96 (0.89, 1.05) | 1.06 (0.91, 1.24) |
 4th quartile | 0.96 (0.90, 1.03) | 1.02 (0.90, 1.17) | 1.11 (0.96, 1.29) |