Table 5.

Mixed-effect logistic regression models

Variable*	Model 1: any AE		Model 2: preventable AE
	OR	95% CI	OR	95% CI
Hospital B	0.42	0.28 to 0.63	0.36	0.23 to 0.56
Hospital C	0.59	0.41 to 0.86	0.73	0.49 to 1.07
Hospital D	0.18	0.12 to 0.29	0.24	0.15 to 0.38
Hospital E	0.49	0.30 to 0.79	0.59	0.36 to 0.98
Age	1.01	1.00 to 1.01	1.01	1.00 to 1.01
Elixhauser score	1.00	0.98 to 1.03	1.01	0.99 to 1.03
Female/male	0.91	0.69 to 1.20	0.99	0.74 to 1.33

*Observer was a random variable.

AE, adverse event.