Body mass index predicts low muscle mass in esophageal squamous cell carcinoma patients undergoing chemoradiotherapy

Table 2 Association between body mass index and low muscle mass

Characteristic	Model 1			Model 2			Model 3
	OR	95%CI	P value	OR	95%CI	P value	OR	95%CI	P value
BMI (continuous)	0.62	0.543-0.709	< 0.001	0.611	0.531-0.703	< 0.001	0.613	0.531-0.707	< 0.001
BMI (categorical)
< 18.5 kg/m2	Reference	Reference	-	Reference	Reference	-	Reference	Reference	-
18.5-24.0 kg/m2	0.146	0.075-0.361	< 0.001	0.165	0.075-0.361	< 0.001	0.159	0.078-0.379	< 0.001
≥ 24.0 kg/m2	0.031	0.00-0.098	< 0.001	0.031	0.009-0.101	< 0.001	0.032	0.010-0.107	< 0.001
P for trend	-	-	< 0.001	-	-	< 0.001	-	-	< 0.001

Model 1: Unadjusted; Model 2: Adjusted for age, gender, Karnofsky performance score, smoking history, alcohol history; Model 3: Age, gender, Karnofsky performance score, smoking history, alcohol history, tumor location, radiotherapy dose, chemotherapy, T stage, N stage, glucose, total cholesterol, triglyceride. OR: Odds ratio; CI: Confidence interval; BMI: Body mass index.