Table 1 Demographic and preoperative characteristics of diverticulitis patients who underwent elective colectomy by type of bowel preparation

Age (years)

0.022

 <55

981

38.87

1760

37.33

298

40.32

3176

37.80

 55–64

755

29.91

1412

29.95

214

28.96

2645

31.48

 65–74

546

21.63

1096

23.24

172

23.27

1907

22.70

 ≥75

242

9.59

447

9.48

55

7.44

674

8.02

Race/ethnicity

<0.0001

 White

1909

75.63

3851

81.68

594

80.38

7021

83.56

 (row %)

14.27

28.79

4.44

52.49

 Black

181

7.17

266

5.64

42

5.68

472

5.62

 (row %)

18.83

27.68

4.37

49.12

 Hispanic

183

7.25

222

4.71

56

7.58

485

5.77

 (row %)

19.34

23.47

5.92

51.27

 Others/Unknown

251

9.94

376

7.97

47

6.36

424

5.05

 (row %)

22.86

34.24

4.28

38.62

Sex

 0.620

 Male

1091

43.23

2063

43.75

322

43.57

3743

44.55

 Female

1433

56.77

2652

56.25

417

56.43

4659

55.45

BMI (kg/m²)

 0.399

 <25

583

23.57

1036

22.29

160

21.83

1823

21.91

 25–29

862

34.84

1696

36.49

244

33.29

2958

35.55

 30–34

590

23.85

1111

23.90

188

25.65

2095

25.18

 ≥35

439

17.74

805

17.32

141

19.24

1444

17.36

ASA classification

0.013

 1–2

1500

59.43

3000

63.63

465

62.92

5324

63.37

 3–4

1022

40.49

1709

36.25

273

36.94

3073

36.57

 Missing

2

0.08

6

0.13

1

0.14

5

0.06

Current smoker

530

21.00

969

20.55

137

18.54

1602

19.07

0.057

Non-independent functional health status

28

1.11

76

1.61

8

1.08

125

1.49

0.295

Diabetes

254

10.06

457

9.69

77

10.42

830

9.88

0.914

Hypertension

1117

44.26

2102

44.58

326

44.11

3639

43.31

0.531

Congestive heart failure

12

0.48

18

0.38

1

0.14

16

0.19

0.046

COPD

93

3.68

169

3.58

21

2.84

274

3.26

0.512

Weight loss>10%

61

2.42

101

2.14

32

4.33

199

2.37

0.004

Bleeding disorder

47

1.86

80

1.70

11

1.49

140

1.67

0.884

Preoperative steroid

118

4.68

151

3.20

20

2.71

326

3.88

0.006