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Table 1 Comparisons of risk factors between hypoglycemia group and non-hypoglycemia group by univariate analysis (n = 1410)

From: Development and validation of a prediction model of perioperative hypoglycemia risk in patients with type 2 diabetes undergoing elective surgery

Variable

Hypoglycemia group (n = 151)

Non-hypoglycemia group (n = 1259)

χ2

P value

Male n (%)

80 (53.0)

724 (57.5)

1.104

0.293

Age > 70 years n (%)

46 (30.5)

275 (21.8)

5.699

0.017

Duration of diabetes ≥ 10 years n (%)

93 (61.6)

454 (36.1)

32.136

< 0.001

BMI (kg/m2) n (%)

21.518

< 0.001

 < 18.5

10 (6.6)

23 (1.8)

  

 18.5–23.9

94 (62.3)

521 (41.4)

  

 ≥ 24

47 (31.1)

715 (56.8)

  

Length of hospital stay (day)

81.145

< 0.001

 < 10

49 (32.4)

821 (65.2)

  

 10~

62 (41.1)

344 (27.3)

  

 ≥ 20

40 (26.5)

94 (7.5)

  

Education > 9 years n (%)

98 (64.9)

763 (60.6)

1.285

0.257

Place of residence n (%)

4.579

0.032

 Rural

89 (58.9)

618 (49.1)

  

 Urban

62 (41.1)

641 (50.9)

  

Family history of diabetes n (%)

17 (11.3)

147 (11.7)

0.126

0.722

Fasting before surgery n (%)

83 (54.9)

487 (38.7)

14.883

< 0.001

Preoperative hypoglycemic regimen n (%)

47.896

< 0.001

 Oral insulin

58 (38.4)

689 (54.7)

  

 Subcutaneous injection of insulin

71 (47.0)

271 (21.5)

  

 Othersa

22 (14.6)

299 (23.8)

  

Surgery day hypoglycemic plan n (%)

42.703

< 0.001

 Oral insulin

22 (14.6)

407 (32.3)

  

 Subcutaneous injection of insulin

47 (31.1)

166 (13.2)

  

 Othersa

82 (54.3)

686 (54.5)

  

SDBG ≥ 3 mmol/L n (%)

72 (47.7)

390 (31.0)

17.233

< 0.001

Hypertension history n (%)

45 (29.8)

459 (36.5)

2.601

0.107

Surgical grade n (%)

47.812

< 0.001

 First level

31 (20.5)

540 (42.9)

  

 Second level

37 (24.5)

316 (25.1)

  

 Third level

70 (46.4)

282 (22.4)

  

 Fourth level

13 (8.6)

121 (9.6)

  

General anesthesia n (%)

63 (41.7)

415 (33.0)

5.122

0.024

Urine sugar n (%)

44 (29.1)

334 (26.5)

0.871

0.351

HbA1c ≥ 6.5% n (%)

104 (68.9)

904 (71.8)

0.389

0.533

  1. BMI body mass index, HbA1c glycated hemoglobin, SDBG standard deviation of blood glucose
  2. aOthers include diet, combination treatment, intravenous insulin, and insulin pump, etc.