Table 4.

Cognitive function, mental health problems and childhood depression in the two birth cohorts.

Variables		Ribeirão Preto		São Luís	P value
	n	% weighted*	n	% weighted*
Raven's test					< 0.001
Below average or poor	103	12.2	202	28.9
Average or above average	672	87.8	468	71.1
Missing	15	-	3	-
Human Figure Drawing (HFD)					< 0.001
Below average, borderline or poor	171	21.5	231	34.2
Average or above average	603	78.5	435	65.8
Missing	16	-	7	-
Strengths and Difficulties Questionnaire					< 0.001
Abnormal	307	38.4	318	47.4
Borderline	126	16.3	116	17.4
Normal	351	45.2	236	35.2
Missing	6	-	3	-
Children's Depression Inventory (CDI)					< 0.001
Positive	56	6.0	141	21.6
Negative	718	94.0	529	78.4
Missing	16	-	3	-

Ribeirão Preto, 2004/05 and São Luís, 2005/06.

* Percentages may not add to 100% because of rounding. Missing values were excluded from percentages and P-value calculations.