Table 4.

Treatment association across confounding-control analyses.

Analysis	Estimate	95% CI lower	95% CI upper	p-value
Unadjusted	2.74	1.35	5.57	0.005
Parsimonious covariate-adjusted	3.72	1.66	8.77	0.002
Broad covariate-adjusted sensitivity	4.50	1.98	10.92	<0.001
Propensity score matched	3.86	1.47	10.10	0.006
Propensity overlap-weighted	3.43	1.54	7.65	0.003
Combined-block-adjusted sensitivity	3.83	1.67	9.31	0.002
Co-intervention-adjusted sensitivity	3.80	1.38	11.51	0.013

Estimates are odds ratios with 95% CIs. The combined-block model adds superficial cervical plexus block and T2 paravertebral field supplementation to the parsimonious adjustment set. The co-intervention model is secondary because several included variables occur after treatment.