Cutting a long story short? The clinical relevance of asking parents, nurses, and young children themselves to identify children's mental health problems by one or two questions.

The associations were statistically highly significant ( P < 0.001) between all pairs of the following groups: in the low prevalence group (<5%) 3% of the children were assigned to diagnoses, in the moderate prevalence group (≥20%) 38%, and in the high prevalence group (≥75%) 93% of the children.

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