The mental health of children its developing countries is important but und
erexplored Methodological problems of prevalence studies in this field incl
ude the toe of case definitions and disability criteria developed ill the W
est and rite assumption that dimensions of disorder and thresholds for repo
rting problems are similar to European and North American populations. Scho
ol, clinic and population-based prevalence studies conducted in developing
countries report a diversity of prevalence rates but the absence of methodo
logical uniformity prevents useful comparisons. in addition to social, demo
graphic and academic associations of child psychiatric disorder in developi
ng countries, the relevance of malnutrition, tropical infections and advers
e perinatal factors is reviewed. The implications of research findings for
service provision are discussed.