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Table 1 Baseline Characteristics

From: Obesity – a risk factor for postoperative complications in general surgery?

 

Normal weight

Underweight

Overweight

Obese

p value

BMI 18.5–25(kg/m2)

BMI < 18.5(kg/m2)

BMI 25–30(kg/m2)

BMI > 30(kg/m2)

(N = 1815)

(N = 100)

(N = 1635)

(N = 743)

Demographics

 

Age, years (mean ± SD)

53.7 (±18.9)

51.6 (±21.6)

57.0 (±15.5)a

55.5 (±14.9)a

<0.001

BMI (mean ± SD)

22.6 (±1.7)

17.3 (±1.1)

27.2 (±1.4)

33.5 (±3.4)

<0.001

Male sex (%)

893 (49.2 %)

39 (39.0 %)a

970 (59.3 %)a

315 (42.5 %)a

<0.001

ASA classification (%)

 

a

a

a

<0.001

I

727 (40.1 %)

31 (31.3 %)

535 (32.8 %)

135 (18.2 %)

 

II

553 (30.5 %)

20 (20.2 %)

636 (39.0 %)

362 (48.8 %)

 

III

460 (25.4 %)

39 (39.4 %)

412 (25.3 %)

223 (30.1 %)

 

IV

72 (4.0 %)

8 (8.1 %)

47 (2.9 %)

21 (2.8 %)

 

V

1 (<1 %)

1 (<1 %)

0 (0.0 %)

1 (<1 %)

 

Medical history (%)

Diabetes mellitus

86 (4.7 %)

6 (6.1 %)

162 (9.9 %)a

134 (18.1 %)a

<0.001

Hypertension

257 (14.2 %)

14 (14.1 %)

360 (22.1 %)a

225 (30.3 %)a

<0.001

Cerebrovascular disease

123 (6.8 %)

8 (8.1 %)

118 (7.2 %)

54 (7.3 %)

0.919

Malignant disease

451 (24.9 %)

25 (25.3 %)

362 (22.2 %)a

172 (23.2 %)

0.308

Pathological cardiac history

302 (16.7 %)

18 (18.2 %)

316 (19.4 %)a

158 (21.3 %)a

0.033

Pathological pulmonary history

261 (14.4 %)

15 (15.2 %)

205 (12.6 %)

138 (18.6 %)a

0.002

Current smokingb

490 (35.4 %)

39 (48.8 %)a

374 (30.4 %)a

163 (26.9 %)a

<0.001

Surgery risk (%)

 

a

 

a

<0.001

Low

1078 (59.4 %)

33 (33.0 %)

969 (59.3 %)

365 (49.1 %)

 

Intermediate

643 (34.4 %)

52 (52.0 %)

577 (35.3 %)

350 (47.1 %)

 

High

94 (5.2 %)

15 (15.0 %)

89 (5.4 %)

28 (3.8 %)

 

Type of anesthesia (%)

General

1499 (82.8 %)

93 (93.9 %)a

1376 (84.3 %)

684 (92.2 %)a

<0.001

Surgical setting (%)

Outpatient surgery

690 (38.0 %)

22 (22.0 %)a

607 (37.1 %)

216 (29.1 %)a

<0.001

  1. aSignificantly different (p < .05) compared to normal weight
  2. bData was available in 76.9 % of patients
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BMC Anesthesiology

ISSN: 1471-2253

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