TABLE 2.

Hierarchical Generalized Linear Models Predicting Low Birth Weight: Michigan Metropolitan Areas, 2000

	Model 1, OR (95% CI)	Model 2, OR (95% CI)	Model 3, OR (95% CI)	Model 4, OR (95% CI)
Maternal characteristics
Age	1.014* (1.010, 1.018)	1.015* (1.011, 1.019)	1.014* (1.010, 1.018)	1.014* (1.010, 1.018)
Race	2.143* (1.991, 2.305)	2.349* (2.225, 2.479)	2.138* (1.987, 2.300)	2.121* (1.971, 2.282)
Census tract characteristics
White segregated	1.002 (0.919, 1.093)	…	1.010 (0.926, 1.101)	1.046 (0.959, 1.141)
Black nonsegregated	1.148** (1.064, 1.237)	…	1.140** (1.057, 1.229)	1.111** (1.030, 1.199)
Black segregated	1.257* (1.132, 1.395)	…	1.187** (1.064, 1.324)	1.151*** (1.030, 1.285)
Poor segregated	…	1.213* (1.120, 1.314)	1.163** (1.067, 1.267)	1.056 (0.963, 1.157)
Vacancies, %	…	…	…	1.070*** (1.015, 1.128)
Women with college education, %	…	…	…	0.996* (0.994, 0.998)

Note. CI = confidence interval; OR = odds ratio. Models included fixed effects for metropolitan statistical area. Ellipses indicate variables not included in the model.

*P < .05; **P < .01; ***P < .001.