Table 1

Sample characteristics, stratified by sex and ICWS group

	Men				Women
	Without ICWS	Investigated	Placed	Total	Without ICWS	Investigated	Placed	Total
	%	%	%	%	%	%	%	%
Born out of wedlock (yes)	4.32	7.91	20.88	6.55	4.37	12.80	23.02	6.45
Mother’s age at birth
Teenager	3.66	4.89	10.23	4.51	3.54	5.92	9.45	4.18
20–35 years of age	80.43	80.03	75.57	79.89	80.66	78.20	75.77	80.10
>35 years of age	15.91	15.08	14.20	15.60	15.79	15.88	14.78	15.71
Occupational status of father at birth
Non-manual worker	57.25	39.61	34.52	52.03	55.01	38.63	33.68	52.22
Manual worker	42.75	60.39	65.48	47.97	44.99	61.37	66.32	47.78
Family education at age 10
Primary	64.23	82.48	87.36	69.60	66.27	81.75	87.46	68.99
Secondary	19.14	9.78	7.10	16.37	18.17	9.00	7.73	16.74
Tertiary	10.92	3.99	2.41	8.91	10.06	3.32	1.20	8.90
Missing	5.71	3.75	3.13	5.12	5.50	5.92	3.61	5.37
Total, row per cent	73.2	17	9.2	100	85.5	6.1	8.4	100
Total, n	5273	1227	704	7204	5926	422	582	6930