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Table 1 Baseline characteristics of sputum smear-positive pulmonary tuberculosis (PTB) cases in Eden District, Western Cape Province, 2007–2013

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

Variables All PTB cases PTB cases with smear resultsa PTB cases without smear resultsa  
n % n % n % p value
Age, years, mean (SD) 36 ± 12.8 - 35 ± 13.1 - 37 ± 12.3   p < 0.0001
Gender        p < 0.0001
 Female 7556 39.35 5130 40.26 2424 37.56  
 Male 11,641 60.65 7612 59.74 4029 62.44  
HIV status        p < 0.0001
 Negative 13,086 68.17 9047 71.00 4039 62.59  
 Positive 4256 22.17 2720 21.35 1536 23.80  
 Unknown 1853 9.65 975 7.65 878 13.61  
Disease classification      p = 0.061
 PTB 19,024 99.11 12,640 99.20 6384 98.93  
 PTB and EPTB 171 0.89 102 0.80 69 1.07  
 TB classification        p < 0.0001
 New 12,833 66.86 10,574 82.99 2259 35.01  
 Re-treatment 6362 33.14 2168 17.01 4194 64.99  
Smear conversion statusa      
 Negative 11,115 87.23 11,115 87.23 - -  
 Positive 1627 12.77 1627 12.77 - -  
Pre-treatment smear grading     p = 0.053
 Scanty 1670 8.70 1101 8.64 569 8.82  
 AFB+ 3991 20.79 2665 20.92 1326 20.55  
 AFB++ 3983 20.75 2659 20.87 1324 20.52  
 AFB+++ 8575 44.67 5712 44.83 2863 44.37  
 Not recorded 976 5.08 605 4.75 371 5.75  
Sub-district        p = 0.887
 Bitou 1662 8.66 1119 8.78 543 8.41  
 George 7101 36.99 4731 37.13 2370 36.73  
 Hessequa 1245 6.49 818 6.42 427 6.62  
 Kannaland 940 4.90 615 4.83 325 5.04  
 Knysna 2088 10.88 1388 10.89 700 10.85  
 Mossel Bay 3090 16.10 2028 15.92 1062 16.46  
 Oudtshoorn 3069 15,99 2043 16.03 1026 15.90  
  1. SD Standard deviation, TB tuberculosis, AFB Acid fast bacilli, PTB Pulmonary TB, EPTB Extra-pulmonary TB
  2. asputum smear results at the end of 2- or 3- month intensive phase of treatment