Older bipolar patients (55–75 years) had 2.5-fold higher odds of LOS of more than four days (OR = 2.523; 95% CI 2.378–2.677; p < 0.001) and total charges of more than $10,287 (OR = 2.503; 95% CI 2.359–2.655; p < 0.001). Bipolar patients with major severity of illness had a higher likelihood of longer hospitalization (OR = 1.734; 95% CI 1.646–1.827; p < 0.001) and higher total charges during hospitalization (OR = 1.873; 95% CI 1.776–1.976; p < 0.001).
