From: Area-level deprivation and preterm birth: results from a national, commercially-insured population
Variable | Model 1 (unadjusted) | Model 2 (minimally adjusted)a | Model 3 (fully adjusted)b | ||||||
---|---|---|---|---|---|---|---|---|---|
OR | 95% CI | P value | OR | 95% CI | P value | OR | 95% CI | P value | |
Area-level deprivation | |||||||||
 Quartile 1 (least deprived) | 1.0 |  |  | 1.0 |  |  | 1.0 |  |  |
 Quartile 2 | 1.112 | 1.037,1.193 | 0.003 | 1.115 | 1.039,1.196 | 0.003 | 1.096 | 1.021, 1.176 | 0.011 |
 Quartile 3 | 1.152 | 1.074,1.235 | < 0.001 | 1.143 | 1.064,1.228 | < 0.001 | 1.113 | 1.035, 1.195 | 0.004 |
 Quartile 4 (most deprived) | 1.328 | 1.241,1.421 | < 0.001 | 1.322 | 1.233,1.417 | < 0.001 | 1.249 | 1.165, 1.339 | < 0.001 |