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Table 4 Comparison of those who re – consented to those who did not re – consent following a change in study sponsorship

From: Incidence of tuberculosis among school-going adolescents in South India

Variable Re – consent givena (N = 4647) (%) Re – consent was not givenb,c (N = 1937) (%) P value
Gender    
 Male 2427 (52.2) 978 (50.5) 0.2
 Female 2220 (47.8) 959 (49.5)  
Age    
 12 years 1383 (29.8) 392 (20.3) <0.01
 13–14 years 2453 (52.8) 1035 (53.4)  
 15–16 years 675 (14.5) 415 (21.4)  
 17–18 years 136 (2.9) 95 (4.9)  
Surveillance    
 Active 2235 (48.1) 808 (41.7) <0.01
 Passive 2412 (51.9) 1129 (58.3)  
Caste    
 Dalit/ Harijan (socially disadvantaged community) 878 (18.9) 340 (17.6) 0.2
 Others 3769 (81.1) 1597 (82.4)  
Mother’s education    
 Illiterate 2221 (47.8) 954 (49.3) 0.3
 Primary education or more 2420 (52.1) 982 (50.7)  
Father’s education    
 Illiterate 1210 (26.0) 501 (25.9) 0.86
 Primary education or more 3416 (73.5) 1430 (73.8)  
Type of house walls    
 Brick 3674 (79.1) 1545 (79.8) 0.52
 Others 973 (20.9) 392 (20.2)  
Type of cooking fuel    
 Wood 3990 (85.9) 1653 (85.3) 0.58
 Others 657 (14.1) 284 (14.7)  
TST Positivity during the follow - up    
 Yes 949 (20.4) 240 (12.4) <0.01
 No 3698 (79.6) 1697 (87.6)  
Symptoms suggestive of TB during the follow – up    
 Yes 96 (2.1) 7 (0.4) <0.01
 No 4551(97.9) 1930 (99.6)  
Significant TB exposure during the 2 years follow – up    
 Yes 65 (1.4) 12 (0.6) 0.01
 No 4582 (98.6) 1925 (99.4)  
Referral to DGW Status    
 Attended the DGW 546 (11.7) 43 (2.2) <0.01
 Didn’t attend the DGW even after referral 510 (11.0) 211 (10.9)  
 Visited DGW even without referral during follow - up 25 (0.5) 4 (0.2)  
  1. Missing data: Mother’s education – 7 (0.1 %), Father’s education – 27 (0.3 %)
  2. a Among the 4647 adolescents one death was reported after re-consent process in active surveillance group which is also included in the table
  3. b Fifty-nine subjects in active surveillance group whose day 720 form filled (closure of the study) before the re – consenting process data was considered as missing data. Of these three deaths were reported
  4. c There were two deaths reported after re-consent process in the passive surveillance group whose number is included in the table
  5. DGW diagnostic ward, TST – tuberculin skin test, Symptoms suggestive of Pulmonary Tuberculosis (PTB) include Cough ≥ 2 weeks, Fever ≥ 2 weeks, Recent Weight loss for ≥ 2 weeks, Night sweats ≥ 2 weeks, Haemoptysis; Significant TB exposure - History of positive TB contact (for more than 8 h/week)