Prognostic value of preoperative weight loss-adjusted body mass index on survival after esophagectomy for esophageal squamous cell carcinoma

Table 2 Optimal cut-off point for body mass index

Deciles of BMI	χ2	HR	95%CI	P value
1 vs 2-10	14.5	1.5	1.2-1.8	0.000
1-2 vs 3-10	15.9	1.4	1.2-1.6	0.000
1-3 vs 4-10	24.5	1.4	1.2-1.6	0.000
1-4 vs 5-10	21.6	1.4	1.2-10.6	0.000
1-5 vs 6-10	18.6	1.3	1.2-1.5	0.000
1-6 vs 7-10	15.1	1.3	1.1-1.5	0.000
1-7 vs 8-10	14.1	1.3	1.1-1.5	0.000
1-8 vs 9-10	7.5	1.3	1.1-1.5	0.006
1-9 vs 10	6.2	1.3	1.1-1.7	0.013

BMI: Body mass index; HR: Hazard ratio; 95%CI: 95% Confidence interval.