Table 2.

Bivariable and multivariable logistic regression analyses on odds of inpatient complications

Patients aged ≥ 65 years	Underweight N = 1299	Normal weight N = 10,330	Bivariable logistic regression		Multivariable logistic regression
Complication	N (%)	N (%)	OR(95% CI)	P Value	aOR (95% CI)	P Value
Any complication	502 (38.6%)	3,781 (36.6%)	1.1 (1.0–1.2)	0.150	1.2 (1.0–1.4)	0.010
Infectious complication	138 (10.6%)	1,152 (11.2%)	0.9 (0.8–1.1)	0.568	1.0 (0.8–1.2)	0.683
Inpatient mortality	103 (7.9%)	431 (4.2%)	2.0 (1.6–2.5)	< 0.001	2.7 (2.0–3.6)	< 0.001
AKI	15 (1.2%)	191 (1.8%)	0.6 (0.4–1.1)	0.077	0.6 (0.4–1.1)	0.083
Cardiac complication	76 (5.9%)	331 (3.2%)	1.9 (1.5–2.4)	< 0.001	2.1 (1.6–2.7)	< 0.001
Pulmonary complication	45 (3.5%)	259 (2.5%)	1.3 (1.0–1.6)	0.059	1.4 (1.1–1.8)	0.009
VTE	115 (8.9%)	973 (9.4%)	0.9 (0.8-–1.1)	0.509	0.9 (0.7–1.1)	0.348

Patients aged 18–64 years	Underweight N = 1688	Normal weight N = 23,074	Bivariable logistic regression		Multivariable logistic regression
Complication	N (%)	N (%)	OR (95%-CI)	P Value	aOR (95%-CI)	P Value
Any complication	657 (38.9%)	8,037 (34.8%)	1.2 (1.1–1.3)	0.001	1.2 (1.1–1.4)	0.006
Infectious complication	222 (13.2%)	2,583 (11.2%)	1.2 (1.0–1.4)	0.014	1.1 (1.0–1.3)	0.155
Inpatient mortality	69 (4.1%)	567 (2.5%)	1.7 (1.3–2.2)	< 0.001	1.5 (1.1–2.2)	0.026
AKI	33 (2.0%)	372 (1.6%)	1.2 (0.8–1.7)	0.285	1.2 (0.9–1.8)	0.244
Cardiac complication	58 (3.4%)	671 (2.9%)	1.2 (0.9–1.6)	0.216	1.1 (0.9–1.5)	0.348
Pulmonary complication	52 (3.1%)	533 (2.3%)	1.18 (1.0–1.4)	0.087	1.2 (0.9–1.4)	0.161
VTE	143 (8.5%)	2,079 (9.0%)	0.9 (0.8–1.1)	0.455	0.9 (0.8–1.1)	0.430

aOR adjusted odds ratio, AKI acute kidney injury, OR odds ratio, VTE venous thromboembolism

Bold text indicates statistical significance of p value less than 0.05