Table 4.

Results of multivariable logistic regression of asphyxia, restricted to term births with birthweight >2500g

Hospital volume category	aOR* (95%CI)	P-value §
1	2.10 (1.18, 3.74)	0.012
2	1.92 (1.04, 3.56)	0.038
3	1.07 (0.64, 1.81)	0.791
4	Ref.	Ref.
Rural hospital volume category	aOR** (95%CI)	P-value §
R1	3.69 (1.90, 7.18)	<0.001
R2	1.53 (0.87, 2.69)	0.138
R3	Ref.	Ref.

aOR: adjusted odds ratio; 95% CI: 95% confidence interval.

^*Regression adjusted for maternal race/ethnicity, education, advanced maternal age, and teaching hospital

^**Regression adjusted for maternal race/ethnicity, education, and advanced maternal age.

^§Robust standard errors correcting for clustering by hospital