Adjusting for severity of illness using logistic regression, the odds of death was similar (p > .1) in July ± September admissions, relative to October ± June admissions, in major (OR 0.96; 95% CI, 0.89 ± 1.03), minor (OR 1.06; 95% CI, 0.96 ± 1.19), and non-(OR 0.95; 95% CI, 0.88 ± 1.01) teaching hospitals. Results were similar when admissions in July, August, and September were examined separately, as shown in the table below (data reflect OR (95% CI)).