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Table 1 Sociodemographic characteristics of the study participants

From: The tuberculin skin test in school going adolescents in South India: associations of socio-demographic and clinical characteristics with TST positivity and non-response

Characteristic a

(N = 6608)

Sex

 

Male

3414 (51.7)

Female

3194 (48.3)

Age

 

11 – 12 years

1778 (26.9)

13 – 14 years

3498 (52.9)

15 – 16 years

1100 (16.6)

17 – 18 years

232 (3.5)

Caste

 

Dalit/Harijan

1230 (18.6)

Others

5378 (81.4)

Religion

 

Hindu

5851 (88.5)

Others

757 (11.5)

Education of mother*

 

Illiterate

3190 (48.3)

Primary or Higher

3411 (51.7)

Education of father*

 

Illiterate

1724 (26.1)

Primary or Higher

4856 (73.5)

Walls

 

Brick

5238 (79.3)

Othersb

1370 (20.7)

Cooking fuel

 

LPG/Gas

819 (12.4)

Othersc

5789 (87.6)

TB Contact*d

 

Yes

44 (0.7)

No

6496 (99.3)

Unexplained cough ≥2 weeks

 

Yes

40 (0.6)

No

6568 (99.4)

Unexplained weight loss ≥2 weeks

 

Yes

27 (0.4)

No

6581 (99.6)

Unexplained fever ≥2 weeks

 

Yes

18 (0.3)

No

6590 (99.7)

Other Symptomse

 

Yes

13 (0.2)

No

6595 (99.8)

Reported BCG immunization*

 

Yes

5649 (87.1)

No

835 (12.9)

BCG Scar

 

Yes

4142 (62.7)

No

2466 (37.3)

BMI- z Score*f

 

Underweight (<− 2)

1991 (30.2)

Overweight (> +1)

181 (2.7)

Normal (−2 to +1)

4430 (67.1)

TST response

 

0 mm

601 (9%)

1 – 4 mm

656 (10%)

5 - 9 mm

4557 (69%)

More than or equal to 10 mm

794 (12.0)

  1. Reported as number and within parenthesis column percentages;
  2. *Because data were not available on some individuals total numbers are lower than the number of subjects who participated in the study
  3. aCumulative response of both parent and subject has been considered in case of history of past TB, TB exposure, Symptoms suggestive of TB, Past disease history and past hospital admission.
  4. bIncludes walls made of Packed mud, Stone, Bamboo, Thatch, Wood.
  5. cIncludes Wood, Kerosene, Coal, Agricultural Residue as cooking fuel.
  6. dRecent contact with a TB case at least for 8 hours a week; in the period of 3 months
  7. eOther symptoms include unexplained Hemoptysis and night sweats for ≥2 weeks
  8. fWHO cut offs 2007, Growth reference 5–19 years; calculated using WHO – ANTHRO software (version 3.2.2).