Provider volume and maternal complications after Caesarean section: results from a population-based study

Table 3 Odds ratios (ORs) and 95% confidence intervals (CIs) for likelihood of maternal post-operative complication after Caesarean section (n = 20,914 patients)

	Model 1^a			Model 2			Model 3
	OR	95% CI		OR	95% CI		OR	95% CI
Provider case volume	0.995	0.992	0.999	0.996	0.992	1.000	0.995	0.991	0.999
Provider years since graduation	0.965	0.956	0.974	0.962	0.953	0.972	0.965	0.956	0.975
Provider not specialized in maternal-fetal medicine or obstetrics & gynecology	1.424	1.006	1.842	1.443	1.013	1.872	1.588	1.149	2.026
Patient age (years)	0.984	0.969	1.000	0.987	0.971	1.003	0.987	0.971	1.003
Diabetes in pregnancy	0.912	0.593	1.230	0.884	0.565	1.203	0.880	0.561	1.200
Admission category elective (vs. urgent)	0.800	0.542	1.058	0.817	0.558	1.076	0.830	0.571	1.090
Patient comorbidity (level vs. none)
1	3.420	3.157	3.683	3.415	3.152	3.679	3.397	3.133	3.661
2	1.647	1.168	2.127	1.666	1.185	2.146	1.664	1.183	2.145
3	2.517	1.960	3.074	2.621	2.063	3.179	2.616	2.058	3.174
4	4.866	4.085	5.647	5.148	4.363	5.932	5.025	4.239	5.810
Missing/not applicable	1.846	1.161	2.531	1.898	1.212	2.584	1.896	1.210	2.583
Neighbourhood income quintile (vs. lowest)
Medium-low				1.022	0.764	1.280	1.025	0.767	1.283
Middle				0.917	0.649	1.186	0.918	0.649	1.186
Medium-high				0.884	0.612	1.156	0.883	0.610	1.155
Highest				0.887	0.617	1.156	0.880	0.610	1.150
Community size ( vs. city (population 100,000-499,000))
Small town (population 10,000-99,999)				1.839	1.617	2.062	1.844	1.622	2.066
rural area (population < 10,000)				1.466	1.246	1.686	1.508	1.288	1.729
Hospital mean annual C-Section volume							1.001	1.000	1.002

^aAll regression models adjust for the listed variables and for a set of dummy variables for each year of the data period (2004–2014)

ISSN: 1471-2393