Retrospective Study
Copyright ©The Author(s) 2020.
World J Diabetes. Oct 15, 2020; 11(10): 447-458
Published online Oct 15, 2020. doi: 10.4239/wjd.v11.i10.447
Table 1 Demographic characteristics of patients diagnosed morbid obesity receiving and not-receiving bariatric surgery
VariableReceiving bariatric surgery
P value1
No [n = 1509 (34.51%)]
Yes [n = 2864 (65.49%)]
n%n%
Malabsorptive procedures--177361.91-
Restrictive procedures--246586.07-
Sex< 0.0001
Female81854.21185564.77
Male69145.79100935.23
Age at baseline, yr< 0.0001
20-2930220.01130545.57
30-64103468.52155854.4
65-10017311.4610.03
mean ± SD44.30 ± 15.2533.09 ± 9.07< 0.00012
Comorbidities
Hypertension75149.772548.87< 0.0001
Hyperlipidemia31420.811103.84< 0.0001
Diabetes mellitus52534.791746.08< 0.0001
Coronary artery disease26117.3692.41< 0.0001
Congestive heart failure24316.1391.36< 0.0001
Stroke1238.15371.29< 0.0001
Chronic kidney disease1248.22220.77< 0.0001
Asthma18612.33752.62< 0.0001
Chronic obstructive pulmonary disease1459.61341.19< 0.0001
Peripheral arterial occlusive disease291.9230.1< 0.0001a
Gastrointestinal ulcer18512.26732.55< 0.0001
Gastrointestinal bleeding442.92120.42< 0.0001
Table 2 Cox model with hazard ratio and 95% confidence intervals of anemia associated with receiving bariatric surgery among morbidly obese patients
VariableAnemia
Crude1
Adjusted2
No. (n = 221)HR(95%CI)P valueHR(95%CI)P value
Receiving bariatric surgery
No381.00reference1.00reference
Yes1831.71(1.2-2.44)0.0032.36(1.52-3.65)0.0001
Gender
Female1861.00reference1.00reference
Male350.32(0.22-0.46)< 0.00010.33(0.23-0.48)< 0.0001
Age
20-29 years881.00reference1.00reference
30-64 years1261.08(0.82-1.41)0.60281.06(0.79-1.41)0.6956
65-100 years71.33(0.61-2.88)0.47241.33(0.54-3.3)0.5391
Comorbidities (ref = non-)
Hypertension411.07(0.76-1.51)0.68371.43(0.9-2.27)0.1349
Hyperlipidemia181.06(0.65-1.71)0.82491.14(0.64-2.01)0.6595
Diabetes mellitus260.95(0.63-1.44)0.8120.96(0.59-1.57)0.8826
Coronary artery disease151.23(0.73-2.08)0.4411.17(0.61-2.25)0.6403
Congestive heart failure101.02(0.54-1.93)0.94360.91(0.42-1.94)0.8027
Stroke40.63(0.23-1.7)0.36110.52(0.18-1.5)0.2286
Chronic kidney disease71.32(0.62-2.8)0.47521.47(0.66-3.28)0.3504
Asthma171.74(1.06-2.85)0.02931.85(1.05-3.25)0.034
Chronic obstructive pulmonary disease60.93(0.41-2.08)0.85140.56(0.22-1.43)0.2267
Peripheral arterial occlusive disease10.99(0.14-7.05)0.99051.47(0.2-10.88)0.705
Gastrointestinal ulcer202.17(1.37-3.44)0.0012.25(1.34-3.77)0.0021
Gastrointestinal bleeding52.64(1.09-6.42)0.03211.83(0.7-4.78)0.2204
Table 3 Incidence rate and hazard ratio with 95% confidence intervals of anemia associated with receiving bariatric surgery, stratified by sex and age
VariableReceiving bariatric surgery
Receiving vs not-receiving bariatric surgery
No
Yes
Crude HRAdjusted HR2
EventPerson yearsIR1EventPerson yearsIR1
Total3863595.981831627711.241.71(1.20-2.44)b2.36(1.52-3.65)c
Gender
Female2734557.821591068814.881.67(1.10-2.53)a2.48(1.50-4.09)c
Male1129053.792455884.291.24(0.60-2.55)2.04(0.89-4.70)
Age group, yr
20-29 yr413862.8984782510.733.11(1.14-8.54)a3.83(1.13-12.99)a
30-64 yr2743416.2299844611.721.81(1.18-2.79)b2.37(1.45-3.88)c
65-100 yr763211.07060--
Table 4 Cox model with hazard ratio and 95% confidence intervals of anemia associated with receiving malabsorptive procedures or restrictive procedures among morbidly obese patients
VariableAnemia
Crude1
Adjusted2
No. (n = 221)HR(95%CI)P valueHR(95%CI)P value
Malabsorptive procedures
No641Reference1Reference
Yes1572.76(2.06-3.70)< 0.00013.18(2.29-4.40)< 0.0001
Restrictive procedures
No621Reference1Reference
Yes1591.38(1.02-1.86)0.03561.55(1.10-2.19)0.0129