Table 1 The characteristics of the included studies
Study name | Study design | Sample size | Prevalence, cases (n) | Age | Country |
|---|---|---|---|---|---|
Morrey [32] | Retrospective | 37 | 43%,16 | <18 years | USA |
Welkon [31] | Retrospective | 26 | 23%,6 | 5 years | USA |
Jackson [30] | Retrospective | 25 | 24%,6 | 12 days-17 years | USA |
Caksen [29] | Retrospective | 8 | 50%,4 | 8.44±4.18 years | Turkey |
Chen [10] | Retrospective | 33 | 12%,4 | 6 years (range 2-11 years) | China |
Deshpande [28] | Retrospective | 13 | 15%,2 | 20.35 days | India |
Belthur [27] | Retrospective | 14 | 36%,5 | 7 years | USA |
Carrillo-Marquez [26] | Retrospective | 18 | 39%,7 | 5.5 years (0.3-17.9 years) | USA |
Fernandez [25] | Retrospective | 20 | 20%,4 | 6.4 years (2-14 years) | Germany |
Lee [24] | Retrospective | 31 | 13%,4 | <18 months | Korea |
Nguyen [23] | Retrospective | 37 | 24%,9 | <15 years | USA |
Schlung [12] | Retrospective | 83 | 34%,28 | <18 years | USA |
Zhang [11] | Retrospective | 12 | 75%,9 | 1-12 months | China |
Murphy [8] | Retrospective | 138 | 40%,55 | 6.1 years (<17 years) | USA |
Refakis [22] | Retrospective | 20 | 35%,7 | 7.0 years (1.2-19.3 years) | USA |
Agarwal [21] | Retrospective | 18 | 28%,5 | 6.22 years | India |
Agarwal [21] | Retrospective | 15 | 53%,8 | 2.9 years | India |
Özcan [20] | Retrospective | 20 | 20%,4 | 7.8 years (1–16 years) | Turkey |
Siddiqui [19] | Retrospective | 36 | 61%,22 | 6±4 years | USA |
Corin [18] | Retrospective | 39 | 46%,18 | 6.4 years (5 weeks-16.6 years) | UK |
Danilov [17] | Retrospective | 41 | 24%,10 | 6.04 years (7 months-14 years) | Germany |