Table 2.

Hazard ratios for mortality up to day 90

	90-day mortality rate
Unadjusted	Events, n (%)	HR (95% CI)
Erythromycin (n = 235)	76 (33.3%)	0.91 (0.69–1.19)
Controls (n = 470)	167 (36.8%)	1.00 (ref)

PS matched
Erythromycin (n = 211)	67 (32.8%)	0.89 (0.64–1.24)
Controls (n = 211)	74 (36.6%)	1.00 (ref)

PS weighted	Events, %
Erythromycin	34.6%	0.95 (0.66–1.36)
Controls	37.3%	1.00 (ref)

CI confidence interval, HR hazard ratio, IPTW inverse probability of treatment weighting, PS propensity score, ref referent