Table 2

Predictors of Postoperative complicationsaccording to univariate andmultivariate logistic regression analysis
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

Mbunda et al.

Mbunda et al. BMC Dermatology 2012 12:17   doi:10.1186/1471-5945-12-17

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