Fig. 2
From: Effect of body mass index on survival of patients with stage I non-small cell lung cancer
Kaplan–Meier progression-free survival (PFS) curves of patients with stage I NSCLC stratified by BMI. a The PFS was longer in the overweight group than in other groups in combination (P = 0.034). b The PFS was longer in the overweight group than in the normal weight group (P = 0.045), but differences were not significant between the overweight group and the underweight group (P = 0.172) and the obese group (P = 0.514)