Impact of body mass index on complications following pancreatectomy: Ten-year experience at National Cancer Center in China

Table 1 Demographic, comorbidity, and operation type in patients grouped according to body mass index

Variable	BMI < 24 kg/m2 (n = 206)	BMI ≥ 24 kg/m2 (n = 156)	Total (n = 362)	P value
Mean age (yr)	59.32	63.14	60.97	0.0111
Sex
Male	95	84	179
Female	111	72	183
Male/female ratio	0.9	1.2	1.0	0.1452
Mean BMI (kg/m2)	21.075	26.993	23.625	< 0.0001
Smoking				0.3641
Never	135	95	230
Ever	71	61	132
Smoking amount (packs/yr)	51	57	53	0.3166
Mean smoking time (yr)	23.25	26.94	25.00	0.3558
Alcohol, n				0.6835
Never	166	123	289
Ever	40	33	73
Comorbidity, n
Any comorbidity	76	107	183	< 0.0001
Diabetes	38	43	81	0.0610
Coronary artery disease	9	40	49	< 0.0001
Hypertension	43	41	84	0.8930
COPD	6	6	12	0.6232
HBV	12	5	17	0.2198
HCV	5	2	7	0.4201
Previous history of cancer, n	1	2	3	0.4253
Previous abdominal surgery, n	21	16	37	0.9514
Family history of cancer, n	11	38	49	< 0.0001
Operation type, n
Pancreaticoduodenectomy	116	79	195	0.2839
Distal pancreatectomy	75	67	142	0.2069
Middle-segment pancreatectomy	15	10	25	0.7461

COPD: Chronic obstructive pulmonary disease; HBV: Hepatitis B virus; HCV: Hepatitis C virus; BMI: Body mass index.