Retrospective Cohort Study
Copyright ©The Author(s) 2015.
World J Gastroenterol. Jun 21, 2015; 21(23): 7218-7224
Published online Jun 21, 2015. doi: 10.3748/wjg.v21.i23.7218
Table 1 Demographic, comorbidity, and operation type in patients grouped according to body mass index
VariableBMI < 24 kg/m2 (n = 206)BMI ≥ 24 kg/m2 (n = 156)Total (n = 362)P value
Mean age (yr)59.3263.1460.970.0111
Sex
Male9584179
Female11172183
Male/female ratio0.91.21.00.1452
Mean BMI (kg/m2)21.07526.99323.625< 0.0001
Smoking0.3641
Never13595230
Ever7161132
Smoking amount (packs/yr)5157530.3166
Mean smoking time (yr)23.2526.9425.000.3558
Alcohol, n0.6835
Never166123289
Ever403373
Comorbidity, n
Any comorbidity76107183< 0.0001
Diabetes3843810.0610
Coronary artery disease94049< 0.0001
Hypertension4341840.8930
COPD66120.6232
HBV125170.2198
HCV5270.4201
Previous history of cancer, n1230.4253
Previous abdominal surgery, n2116370.9514
Family history of cancer, n113849< 0.0001
Operation type, n
Pancreaticoduodenectomy116791950.2839
Distal pancreatectomy75671420.2069
Middle-segment pancreatectomy1510250.7461
Table 2 Postoperative complications in patients grouped according to body mass index n (%)
ComplicationBMI < 24 kg/m2BMI ≥ 24 kg/m2TotalOR95%CIP value
(n = 206)(n = 156)(n = 362)
Patients with any complication61 (29.6)67 (42.9)128 (35.4)1.1281.087-1.3760.0086
Pancreatic fistula34 (16.5)30 (19.2)64 (17.7)0.8250.430-1.5820.4340
Delayed gastric emptying12 (5.8)31 (19.9)43 (11.9)1.2791.072-1.487< 0.0001
Bile leak4 (1.9)12 (7.7)16 (4.4)1.3321.193-1.7250.0068
Reoperation4 (1.9)2 (1.3)6 (1.7)1.5130.267-8.5700.6627
Readmission1 (0.5)1 (0.6)2 (0.6)0.3820.291-0.5320.3897
Gastrointestinal hemorrhage6 (2.9)4 (2.6)10 (2.8)1.2710.344-4.6970.8782
Wound infection8 (3.9)8 (5.1)16 (4.4)0.5130.193-1.3670.2229
Cholangitis3 (1.5)2 (1.3)5 (1.4)1.1620.253-3.9210.8881
Urinary tract infection8 (3.9)10 (6.4)18 (5.0)0.4690.212-1.2190.2229
Pneumonia2 (1.0)3 (1.9)5 (1.4)1.1430.893-2.1340.4421
Intra-abdominal abscess6 (2.9)3 (1.9)9 (2.5)0.4500.112-5.3210.5493
Bacteremia3 (1.5)6 (3.8)9 (2.5)0.6310.461-5.2350.1481
Central line infection7 (3.4)6 (3.8)13 (3.6)0.7780.353-2.3410.8205
Pulmonary embolus0 (0.0)0 (0.0)0 (0.0)NANANA
Deep venous thrombosis1 (0.5)1 (0.6)2 (0.6)0.1240.064-7.3200.8432
Arrhythmia7 (3.4)7 (4.5)14 (3.9)0.4910.212-1.6250.5467
Cerebrovascular accident1 (0.5)0 (0.0)1 (0.3)NANA0.3919
Mortality3 (1.5)2 (1.3)5 (1.4)1.2590.203-7.8150.9288
Table 3 Association between operative difficulty, length of hospital stay, and cost with body mass index
VariableBMI < 24 kg/m2BMI ≥ 24 kg/m2TotalOR95%CIP value
(n = 206)(n = 156)(n = 362)
Mean operative time (min)229.59235.03231.910.9420.651-1.3620.6050
Mean intraoperative blood loss (mL)450520.41481.160.9260.617-1.3890.4433
Blood transfusion, n103791820.7030.413-1.1970.9311
Mean hospital stay (d)21.8524.2222.870.9680.670-1.3980.1167
Mean cost (in RMB)78519.6276160.0577527.281.4930.760-2.9310.8532