Table 2.

Risk factors for pneumonia identified by multivariate analysis

Risk factors	Regression coefficient	Odds ratio	95% CI	P value
Body mass index <18.5 kg/m2	4.165	2.3	1.6‐3.6	<0.001
Age ≥50 years	2.645	1.7	1.2‐2.6	0.01
Smoking history	3.314	2.0	1.3‐3.1	0.001
Use of atypical antipsychotics	1.996	2.7	1.0‐17.7	0.046
Use of typical antipsychotics	−3.140	0.35	0.18‐0.67	0.002
Total chlorpromazine equivalent dose ≥600 mg	4.518	2.6	1.7‐4.0	<0.001

CI, confidence interval.