Table 2. Single factor regression analysis.

Variables	P-value	EXP (B)	95% CI
P-values were calculated by univariate analysis. CI: confidence interval; TSF: triceps skinfold thickness; AMC: arm medium circumference; NRS-2002: nutritional risk screening 2002; CRP: C-reactive protein; IL-6: interleukin-6; PaO2/FiO2: arterial partial pressure of oxygen/fraction of inspired oxygen.
Age	0.126	1.029	0.992–1.066
Serum albumin	<0.001	0.686	0.563–0.837
Serum prealbumin	<0.001	0.974	0.964–0.985
TSF (% of normal value)	0.816	0.998	0.986–1.011
AMC (% of normal value)	0.024	0.954	0.916–0.994
Lymphocyte count	0.004	0.221	0.078–0.622
NRS-2002	<0.001	10.912	3.161–37.673
Leukocytes	0.024	1.193	1.024–1.391
Hemoglobin	<0.001	0.924	0.890–0.961
Urea	0.002	1.586	1.189–2.115
CRP	0.009	1.070	1.017–1.126
IL-6	0.184	1.019	0.991–1.047
PaO2/FiO2	<0.001	0.977	0.967–0.987