Table 3. Hospital variance and 95% credible interval for null analyses and analyses fully adjusted for covariates listed in Table 2, from a multilevel model of births nested in hospitals.

Multilevel Regression Models	Hospital Variance (95% Credible Interval)
All births, null model	0.13 (0.11, 0.14)
All births, fully adjusted model	0.14 (0.12, 0.15)
All births to women with no prior cesarean, null model	0.14 (0.12, 0.15)
All births to women with no prior cesarean, fully adjusted model	0.16 (0.14, 0.18)
All births to lower risk women, null model	0.20 (0.18, 0.21)
All births to lower risk women, fully adjusted model	0.26 (0.23, 0.29)
All births to higher risk women, null model	0.30 (0.28, 0.34)
All births to higher risk women, fully adjusted model	0.25 (0.21, 0.28)