Table 2.
Details of study participants demographics and whether data were provided
| Author | Year | Journal | Intervention group age | Comparator group age | Intervention group sex | Comparator group sex |
| Biernat et al 11 | 2014 | J Strength Cond Res | 17.2 (0.6) | 16.5 (0.8) | All male | All male |
| Cannell et al 16 | 2001 | Br J Sports Med | No response from author within time limit | |||
| Jonsson et al 14 | 2005 | Br J Sports Med | Author confirmed age specific data not obtainable | |||
| Topol, et al 9 | 2011 | P ediatrics | 13.3 (range 10–17) | 51 boys and three girls | ||
| Trail et al 10 | 1988 | J Pediatr Orthop | 13 years 9 months (range 11–17) | 12 years 7 months (range 10–17) | Not stated | Not stated |
| Wang et al 12 | 2007 | Am J Sports Med | Author confirmed no participants under age 18 took part in the study (note study did state age range lower limit was 16) | |||
| Willberg et al 15 | 2011 | Br J Sports Med | No response from author within time limit | |||
| Van Ark et al 13 | 2016 | J Sci Med Sport | Only one under 18 year old participant took part hence study excluded from data analysis |