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Table 2 Predictors of Postoperative complications according to univariate and multivariate logistic regression analysis

From: Experiences with Surgical treatment of chronic lower limb ulcers at a Tertiary hospital in northwestern Tanzania: A prospective review of 300 cases

Predictor (Independent) variables

Post operative complications n (%)

Univariate analysis

Multivariate analysis

 

Absent

Present

OR

95% CI

P value

OR

CI

P value

Age

        

 ≤20

39(48.8)

41(51.3)

      

 >20

83(37.7)

137(62.3)

1.6

0.9-2.6

0.087

3.0

1.4-6.3

0.004

Sex

        

 Male

102(51.0)

98(49.0)

      

 Female

20(20.0)

80(80.0)

4.2

2.4-7.3

<0.001

4.3

2.1-8.7

<0.001

HIV status

        

 Positive

4(20.0)

16(80.0)

      

 Negative

118(42.1)

162(57.9)

2.9

0.9-8.9

0.062

   

CD4 count

        

 <200 cells/μl

1(50.0)

1(50.0)

      

 ≥200 cells/μl

3(23.1)

10(76.9)

1.3

0.2-2.7

0.082

   

Pre-morbid illness

        

 Absent

11(20.4)

43(79.6)

      

 Present

111(45.1)

135(54.9)

3.2

1.6-6.5

0.001

0.4

0.2-1.0

0.041

Tobacco smoking

        

 Yes

30(44.1)

38(55.9)

      

 No

92(39.7)

140(60.3)

1.9

0.4- 5.4

0.897

   

Duration of illness

        

 1/12-3/12

115(48.7)

121(51.3)

      

 3/12-1 year

3(7.1)

39(92.9)

12.4

3.7-41.1

<0.001

8.0

2.1-30.0

0.002

 >1 year

4(18.2)

18(81.8)

4.3

1.4-13.0

0.010

   

Type of ulcer

        

 Traumatic ulcer

107(59.1)

74(40.9)

      

 Vascular ulcer

4(36.4)

7(63.6)

2.5

0.7-9.0

0.150

   

 Neoplastic ulcer

4(20.0)

16(80.0)

5.8

1.9-18.0

0.002

   

 Infective ulcer

3(7.0)

40(93.0)

19.3

5.7-64.7

<0.001

17.6

4.7-66.0

<0.001

 Metabolic ulcer

2(5.7)

33(94.3)

23.9

5.6-102.5

<0.001

8.4

1.8-39.4

0.007

 Neuropathic ulcer

2(25.0)

6(75.0)

4.3

0.9-22.1

0.077

   

 Ulcerating skin disease

0(0.0)

2(100)

--

--

--

   

Ulcer size in cm

        

 ≤5

90(47.9)

98(52.1)

      

 >5-10

28(31.8)

60(68.2)

2.0

1.2-3.4

0.013

   

 >10

4(16.7)

20(83.3)

4.6

1.5-13.9

0.007

   

Mode of treatment

        

 Conservative

14(36.8)

24(63.2)

      

 Surgical

108(41.2)

154(58.8)

0.8

0.4-1.7

0.608

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