Table 2

Differences of participants and non-participants of the cohorts for socioeconomic status (SES based on occupation) according to adolescents' reports at age 13

		Cohort 1 SES of fathers				Cohort 2 SES of mothers
		Cohort 1 (n=617)	Non-responding fathers (n=246)			Cohort 2 (n=701)	Non-responding mothers (n=162)
Manual	29	31		8	14
Non-manual, low	6	7		15	19
Non-manual, middle/high	43	30		48	33
Farmer/fisherman	5	4		1	1
Non-workers	2	3		15	17
Unclassified	10	9		3	5
No response	6	17		9	12
	χ² = 33.4, p <0.001			χ² = 15.1, p <0.02
Living with father/mother	92	71^2-152		96	91^2-150
Gender (girls)	42	52^2-151		43	53^2-150

↵2-150 p ⩽0.05,
↵2-151 p ⩽0.01,
↵2-152 p ⩽0.001. Data shown as percentages.