Table 3.

The multilevel logistic regression model with clinician and hospital random effects

Variable	N	Levels	Odds ratio	95% CI	p-value
Group	566	Control			0.843
	594	Intervention	0.85	0.17-4.30
Survey	275	Baseline			0.159
	222	1st Follow-up	0.37	0.14-0.96
	220	2nd Follow-up	0.42	0.16-1.16
	443	3rd Follow-up	0.41	0.17-0.98
Group × Survey	103	Intervention × Baseline			0.048
	119	Intervention × 1st Follow-up	1.03	0.28-3.72
	109	Intervention × 2ndFollow-up	0.30	0.08-1.15
	263	Intervention × 3rd Follow-up	0.30	0.09-1.02
Crackles	742	Absent			< 0.001
	56	Present	6.98	2.61-18.67
	362	Not recorded	2.11	1.29-3.44
Random-effects	N	Component	Estimate	95% CI
Clinician	308	Standard deviation	1.20	0.92-1.57
Hospital	8	Standard deviation	0.90	0.51-1.57