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Table 4 Predictors of tuberculosis smear non-conversion in re-treatment tuberculosis cases

From: Risk factors for tuberculosis smear non-conversion in Eden district, Western Cape, South Africa, 2007–2013: a retrospective cohort study

Variable Total Non-converters Univariate analysis Multivariate analysis
N n % Crude OR 95 % CI p-value Adjusted OR 95 % CI p-value
Gender 2168 216        
 Female 750 54 7.2 Reference    Reference   
 Male 1418 162 11.42 1.66 1.21–2.29 0.002 1.68 1.21–2.33 0.002
HIV 2168 216        
 Negative 1509 133 8.81 Reference    Reference   
 Positive 528 68 12.88 1.53 1.12–2.08 0.007 1.81 1.32–2.51 0.000
 Unknown 131 15 11.45 1.34 0.76–2.36 0.314 1.38 0.77–2.46 0.268
Pretreatment smear grading 2168 216        
 Scanty 165 5 3 Reference    Reference   
 AFB+ 394 17 4.31 1.44 0.52–3.97 0.479 1.56 0.56–4.32 0.389
 AFB++ 432 38 8.79 3.08 1.19–7.98 0.020 3.54 1.36–9.20 0.009
 AFB+++ 1099 152 13.83 5.14 2.07–12.7 <0.000 5.79 2.33–14.4 0.002
 Not recorded 78 4 5.13 1.73 0.45–6.63 0.424 1.99* 0.52–7.68 0.315