Table 3 Proportions of “lost to follow-up” among various characteristics, foreign-born LTBI patients (n = 1391)

 Male

665

58

19

77

11.6

 Female

726

59

31

90

12.4

 0–14

49

3

2

5

10.2

 15–19

61

4

1

5

8.2

 20–29

630

47

21

68

10.8

 30–39

302

29

17

46

15.2

 40–49

195

21

6

27

13.8

 50 plus

154

13

3

16

10.4

 Healthcare workers (HCW)

110

10

0

10

9.1

 Full-time work, other than HCW

495

28

24

52

10.5

 Self-employed

19

1

1

2

10.5

 Employed on daily/temporal basis

114

19

5

24

21.1

 Houseworkers

16

2

0

2

12.5

 Students, high school and above

432

38

9

47

10.9

 Secondary, primary school students, other children and infants

54

4

2

6

11.1

 Others and unknown

67

8

8

16

23.9

 Unemployed

84

7

1

8

9.5

 the Philippines

320

33

11

44

13.8

 China

268

14

18

32

11.9

 Vietnam

196

19

8

27

13.8

 Nepal

194

17

0

17

8.8

 Indonesia

66

3

4

7

10.6

 Myanmar

56

3

2

5

8.9

 Others

291

28

7

35

12.0

 National health insurance

1313

107

48

155

11.8

 Social Welfare

18

3

0

3

16.7

 Others and unknown

60

7

2

9

15.0

 INH monotherapy

1309

113

48

161

12.3

 RFP monotherapy

78

3

2

5

6.4

 Other

4

1

0

1

25.0

 Routine screening

95

10

1

11

11.6

 Contact investigation

1101

89

46

135

12.3

 At hospital

120

13

3

16

13.3

 Other mass screening

29

1

0

1

3.4

 Others

46

4

0

4

8.7

 within 2 years

381

22

15

37

9.7

 more than 2 years, within 5 years

222

18

15

33

14.9

 more than 5 years, within 10 years

74

10

1

11

14.9

 10 years or more

199

18

1

19

9.5

 Unknown

515

49

18

67

13.0