Table 5:

Readmission with bacterial CAP diagnosis within 1 year of previous admission and its association with comorbidities known for community-acquired bacterial pneumonia hospitalization and socio-demographic characteristics

Risk factors	RR	p-value
Comorbidity/behavioral characteristics
COPD
yes	1.55 (1.05,2.77)	0.027
no	ref	ref
Heart failure
yes	0.77 (0.51,1.18)	0.228
no	ref	ref
Stroke
yes	0.99 (0.51,1.93)	0.970
no	ref	Ref
Diabetes Mellitus type 2
yes	1.12 (0.76,1.66)	0.553
no	ref	ref
Smoking
ever	1.06 (0.72,1.55)	0.786
never	ref	ref
BMI
underweight (BMI < 18.5)	1.74 (1.04,2.90)	0.034
overweight (BMI 25.0 – 29.9)	0.74 (0.44,1.22)	0.235
obese or worse (BMI ≥ 30.0)	0.97 (0.62,1.52)	0.886
normal (BMI 18.5 – 24.9)	ref	ref
Socio-demographic characteristics
Age
≥ 65	0.80 (0.55,1.18)	0.267
< 65	ref	ref
Sex
female	0.99 (0.68,1.44)	0.947
male	ref	ref
Race
black	0.81 (0.55,1.19)	0.280
others	0.47 (0.12,1.87)	0.286
white	ref	ref
Admission source
home	0.61 (0.40,0.93)	0.022
physician office	ref	ref

Model adjusted for medical intensive care unit admission, Charlson comorbidity index, age, sex, race, smoking status. RR: adjusted risk ratio estimate from modified Poisson regression model. ref: reference group. COPD: chronic obstructive pulmonary disease. COPD diagnosis was based on time of bacterial pneumonia admission.