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 | 1.15 (1.04, 1.27) | 1.10 (1.01, 1.20) | 1.31 (1.15, 1.49) |
 3rd quartile | 1.28 (1.16, 1.41) | 1.25 (1.13, 1.37) | 1.47 (1.28, 1.68) |
 4th quartile | 1.54 (1.39, 1.70) | 1.42 (1.25, 1.62) | 1.79 (1.62, 1.98) |
Model 2: Poverty*population density (interaction P-value = 0.0010) | |||
 1st quartile | 1.00 | 1.00 | 1.00 |
 2nd quartile | 1.14 (1.05, 1.23) | 1.00 (0.94, 1.06) | 1.08 (0.99, 1.17) |
 3rd quartile | 1.14 (1.06, 1.23) | 1.03 (0.96, 1.09) | 1.04 (0.96, 1.13) |
 4th quartile | 1.05 (0.97, 1.13) | 0.96 (0.88, 1.05) | 1.12 (1.05, 1.19) |
Model 1: African American*population density (P-value = 0.0099) | |||
 1st quartile | 1.00 | 1.00 | 1.00 |
 2nd quartile | 1.08 (1.01, 1.15) | 1.07 (0.99, 1.15) | 1.14 (0.96, 1.37) |
 3rd quartile | 1.26 (1.18, 1.35) | 1.27 (1.16, 1.38) | 1.51 (1.27, 1.78) |
 4th quartile | 1.56 (1.46, 1.67) | 1.64 (1.43, 1.87) | 2.06 (1.76, 2.42) |
Model 2: African American*population density (P-value = 0.13) | |||
 1st quartile | 1.00 | 1.00 | 1.00 |
 2nd quartile | 0.98 (0.93, 1.04) | 0.98 (0.93, 1.04) | 1.05 (0.92, 1.21) |
 3rd quartile | 0.97 (0.92, 1.03) | 1.00 (0.94, 1.07) | 1.12 (0.99, 1.28) |
 4th quartile | 0.94 (0.89, 1.00) | 0.98 (0.89, 1.09) | 1.13 (1.00, 1.28) |