Comparison of reasons for childhood consultations in Australia, UK and US with number of systematic reviews.

ICD-9, International Classification of Disease Revision 9; N, number of systematic reviews.*Based on 341 systematic reviews; excluded systematic reviews relevant to developing countries only (n = 55).†Weekly Returns Service data does not include ICD-9 ‘V-codes’ (relating to supplementary classification of factors influencing health status and contact with health services), therefore no UK data is available for well-child visit.‡Limited Australian data available for comparison.§Excluding asthma.---Did not report data to stratify into diagnostic category.