Table 1 Preoperative characteristics of patients according to type of bariatric surgery

Gender

 Female, n (%)

 Male, n (%)

372 (78.3)

103 (21.7)

522 (77.3)

153 (22.7)

161 (80.1)

40 (19.9)

0.700^a

Age on day of surgery (years)

47.2 ± 9.6

47.3 ± 10.2

47.5 ± 10.9

0.905^b

Diabetes duration (years)

5 (2–9)

5 (2–9)

5 (3–10)

0.332^c

BMI (kg/m²)

43.7 ± 6.7

44.6 ± 7.0

43.8 ± 6.9

0.071^b

Body Weight (Kg)

115.5 ± 21.7

117.3 ± 22.7

114.9 ± 21.4

0.227^b

Insulin use, n (%)

134 (28.2)

186 (27.6)

65 (32.3)

0.413^a

Number of oral antidiabetic medications before surgery, n (%)

 0

 1

 2

 ≤3

88 (18.5)

283 (59.6)

86 (18.1)

18 (3.8)

143 (21.2)

398 (59.0)

112 (16.6)

22 (3.2)

40 (19.9)

112 (55.7)

43 (21.4)

6 (3.0)

0.712^a

Fasting blood sugar (mg/dl)

168.4 ± 66.1

166.4 ± 59.9

173.1 ± 67.9

0.422^b

HbA1c (%)

7.7 ± 1.8

7.8 ± 1.8

7.8 ± 1.8

0.939 ^b

Total cholesterol (mg/dl)

189.0 ± 53.7

187.1 ± 43.1

182.2 ± 47.2

0.237 ^b

Triglyceride (mg/dl)

202.9 ± 119.2

192.6 ± 105.1

192.3 ± 105.9

0.259 ^b

HDL-cholesterol (mg/dl)

44.7 ± 11.3

44.7 ± 10.2

43.7 ± 9.6

0.422 ^b

LDL- cholesterol (mg/dl)

108.0 ± 41.2

106.4 ± 36.0

103.0 ± 37.9

0.303 ^b

AST (IU/L)

23 (16–32)

21 (16–30)

23 (17–34)

0.151 ^c

ALT (IU/L)

29 (19–46)

26 (18–38)

27 (17–43)

0.028 ^c

Systolic blood pressure, mm Hg

128.9 ± 17.0

128.3 ± 15.5

128.5 ± 16.8

0.782 ^b

Diastolic blood pressure, mm Hg

82.3 ± 10.9

82.3 ± 9.8

81.7 ± 9.9

0.746 ^b

Hypertension, n (%)

207 (43.6)

278 (41.2)

84 (41.8)

0.717 ^a

Cardiovascular Disease, n (%)

98 (20.6)

204 (30.2)

73 (36.3)

< 0.001 ^a

Dyslipidemia, n (%)

212 (44.6)

333 (49.3)

80 (39.8)

0.040 ^a

Hypothyroidism, n (%)

128 (26.9)

202 (29.9)

58 (28.9)

0.546 ^a

Sleep Apnea, n (%)

166 (34.9)

200 (29.6)

69 (34.3)

0.129 ^a

Asthma, n (%)

44 (9.3)

60 (8.9)

23 (11.4)

0.548 ^a

Fatty Liver, n (%)

388 (81.7)

593 (87.8)

165 (82.1)

0.008 ^a

Family History of, n (%)

 Obesity

 Hypertension

 T2DM

 Dyslipidemia

 Fatty Liver

152 (32.0)

25 (5.3)

341 (71.8)

6 (1.3)

42 (8.8)

243 (36.0)

53 (7.8)

481 (71.3)

9 (1.3)

53 (7.8)

69 (34.3)

18 (8.9)

128 (63.7)

3 (1.5)

16 (7.9)

0.372 ^a

0.132 ^a

0.081 ^a

0.972 ^a

0.826 ^a