“…Excluding specific populations, such as those with a primary health diagnosis other than a mental health problem, may limit the generalisability of the review beyond ‘general’ populations. Studies also differed markedly in the age range of children and young people being considered, focusing specifically on pre-adolescen ts, 49 , 52 , 55 , 56 , 58 , 66 , 67 , 70 , 73 – 76 adolescents, 50 , 53 , 57 , 61 , 77 , 78 or a combination of the two, 48 , 51 , 54 , 59 , 60 , 62 – 65 , 68 , 69 , 71 , 72 , 79 – 91 limiting the extent to which the needs of each group can be identified.…”