Table 1 Characteristics of included studies

64

32

5 years

23

71

959

959

9 months

42

4

106

87

18 months

13

15

194

194

Minimum 12 months

38

19.6

57

57

Minimum 33 months

8

14

191

188

Average 16 months (3-60 months)

22

11.7

37

37

Minimum 6 weeks

1

2.7

162

105

Average 40 months (24-76 months)

2

1.9

31

31

52 weeks

2

6.5

19

19

Minimum 2 years

1

5.3

49

49

Minimum 6 months

3

6.1

133

120

Average 54.4 months (24-104 months)

1

0.8

100

100

Minimum 12 months

12

12

1016

933

Average 6.3 years (1.6-14.2 years)

77

8.3

40

40

Average 24.3 months (21-28 months)

15

37.5

75

66

Average 22 months (16-29 months)

5

7.6

980

920

Minimum 2 years

40

4.3

14522

14522

Average 1.9 years

95

0.7

103

103

Average 21 months (6-66 months)

2

1.9

59244

59244

Minimum 3 months

955

1.6

13358

13358

Minimum 3 months

298

2.2

1841

1355

Average 10.3 years

23

1.7

1205

1112

2 years

16

1.4

26

26

Minimum 12 months

6

23

969

969

Minimum 45 days

1

0.1

102

73

Minimum 3 months

6

8.2

1121

1121

Minimum 3 months

20

1.8

2558

2424

Average 56.7 months (7.6-124 months)

108

4.5

59

57

Minimum 3 months

14

24.6

27

27

2 years

4

14.8

127

127

Average 10.1 months

19

15

9766

9766

Average 9.2 weeks

111

1.14

424

424

37 months

38

9

358

358

Minimum 3.5 months

10

2.8

958

811

24 months

72

8.8

200

166

6 months

8

5

2559

2559

3 months

6

0.23