Table 1 Descriptive characteristics of contacts identified through high priority contact tracing stratified by adults (≥15) and children (< 14)

Number of contacts found

296

185

111

Mean age

29.2 yrs.

41.9 yrs.

7.8 yrs.

range

0-87 yrs

15-87 yrs

0-14 yrs

Sex ratio (M:F)

0.9

0.85

0.98

IC ss+

144/296

96/185

48/111

48.7%

52.0%

43.2%

Home contacts

210 /296

122/185

88/111

71.0%

65.9%

79.3%

Symptoms present

50/296

34/185

16/111

16.9%

18.4%

14.4%

LTBI^a

103/253

69/150

34/103

40.7%

46.0%

33.0%

Active TB^b

4/296

3/185

1/111

1.4%

1.6%

0.9%

TB specific changes in chest-x-ray

2/212

2/143

0/69

0.9%

1.4%

0.0%

TST positive^c

35/95

5/7

30/88

36.8%

71.4%

34.1%

QFTG positive

89/214

69/149

20/65

41.6%

46.3%

30.8%

TST positive confirmed by QFTG/ TST positive with QFTG result

10/21

2/5

8/16

47.6%

40%

50%

QFTG positive with IC ss+ / IC ss + with QFTG result

51/105

41/76

10/29

48.6%

53.9%

34.5%

QFTG positive and active TB / active TB with QFTG result

0/2

0/2

0/0

0.0%

0.0%

0.0%

QFTG positive and high household risk / high household risk with QFTG result

35/66

26/46

9/20

53.0%

56.5%

45%

QFTG positive and home contact^d/ home contact with QFTG result

57/150

41/97

16/53

38.0%

42.3%

30.2%

QFTG pos & symptoms/ symptoms with QFTG results

19/37

15/27

4/10

51.4%

55.6%

40.0%

Immune response^e & symptoms with chest-x-ray done/Immune response & symptoms

13/22

10/15

3/7

59.1%

66.7%

42.9%