Table 2.

Crude and adjusted hazard ratio (HR) for hospital length of stay in surviving patients

	Crude HR (95% CI)	P value	Adjusted HR (95% CI)	P value
Sex
Male	1 (ref)		1 (ref)
Female	0.82 (0.60–1.10)	0.186	0.81 (0.59–1.13)	0.216
Age, years
18–35 years	1 (ref)		1 (ref)
36–55 years	0.69 (0.37–1.29)	0.239	0.70 (0.36–1.37)	0.299
≥56 years	0.63 (0.35–1.15)	0.132	0.64 (0.34–1.20)	0.164
Oxygen support at admission
0–4 L	1 (ref)		1 (ref)
5–9 L	1.42 (0.92–2.19)	0.111	1.34 (0.85–2.11)	0.210
≥10 L	1.08 (0.63–1.84)	0.787	0.96 (0.54–1.72)	0.897
Obesity
BMI < 30	1 (ref)		1 (ref)
BMI ≥ 30	1.1 (0.80–1.47)	0.619	1.04 (0.66–1.30)	0.802
Type 2 diabetes
Yes	1 (ref)		1 (ref)
No	0.93 (0.67–1.28)	0.637	0.93 (0.66–1.30)	0.667
Handgrip strength: High vs. Other
Other	1 (ref)		1 (ref)
High	1.47 (1.07–2.03)	0.019*	1.48 (1.05–2.09)	0.024*
CSAVL: High vs. Other
Other	1 (ref)		1 (ref)
High	1.05 (0.76–1.45)	0.770	0.88 (0.59–1.32)	0.534
Handgrip strength: Low vs. Other
Other	1 (ref)		1 (ref)
Low	0.90 (0.65–1.24)	0.510	0.94 (0.66–1.33)	0.713
CSAVL: Low vs. Other
Other	1 (ref)		1 (ref)
Low	0.63 (0.46–0.88)	0.006**	0.59 (0.40–0.87)	0.007**
Handgrip strength: Standardized	1.23 (1.06–1.43)	0.007**	1.26 (1.07–1.48)	0.005**
CSAVL: Standardized	1.20 (1.03–1.39)	0.016*	1.24 (1.03–1.50)	0.023*

CSA_VL, vastus lateralis cross‐sectional area.

The Cox proportional hazards model was adjusted by sex (male or female), age (18–35, 36–55, or ≥56 years), oxygen support at admission (0–4 L, 5–10 L, and ≥10 L), obesity (BMI < 30 and BMI > 30), and type 2 diabetes (yes or no).

^* P < 0.05.

^** P < 0.01.