Table 3 Multivariable logistic regression of 28-day mortality in subgroup analysis of mechanical ventilation and H2RA groups (note: same covariates were used in these models as the mortality analysis)
Predictor | Odds ratio | p value | 95% confidence interval |
|---|---|---|---|
Reference group: baseline | |||
 Group 1 | 1.438 | <  .001 | 1.282–1.613 |
 Group 2 | 0.808 | 0.003 | 0.701–0.932 |
 Group 3 | 1.074 | 0.223 | 0.957–1.206 |