Table 1.

 Characteristics of sample

	No of study members (unweighted)			Unweighted%	Weighted%
	Women	Men	Total
Childhood socioeconomic conditions
Father's social class:
Non-manual	823	892	1715	40.2	24.2
Manual	1222	1334	2556	59.8	75.8
No (deaths) in sample	2045 (89)	2226 (112)	4271 (201)
Father's education:
Secondary level	535	588	1123	28.5	18.5
Primary level only	1367	1455	2822	71.5	81.5
No (deaths) in sample	1902 (87)	2043 (103)	3945 (190)
Mother's education:
Secondary level	414	476	890	22.3	15.3
Primary level only	1504	1599	3103	77.7	84.7
No (deaths) in sample	1918 (86)	2075 (106)	3993 (192)
Housing quality (at age 4 years):
Good or intermediate	1078	1081	2159	52.4	46.8
Intermediate	507	575	1082	26.3	27.5
Worst	395	484	879	21.3	25.6
No (deaths) in sample	1980 (90)	2140 (106)	4120 (196)
Care of house and child (at age 4 years):
Best	774	794	1568	40.8	34.9
Intermediate	478	521	999	26.0	26.1
Worst	594	679	1273	33.2	39.1
No (deaths) in sample	1846 (83)	1994 (102)	3840 (185)
Adult socioeconomic conditions (26 years)
Household social class:
Non-manual	974	946	1920	50.9	43.2
Manual	883	968	1851	49.1	56.8
No (deaths) in sample	1857 (79)	1914 (90)	3771 (169)
Highest social class:
Non-manual	1412	1363	2775	73.6	68.3
Manual	445	551	996	26.4	31.7
No (deaths) in sample	1857 (79)	1914 (90)	3771 (169)
Own educational qualifications:
Any qualifications	1198	1290	2488	60.0	52.7
No qualifications	792	868	1660	40.0	47.3
No (deaths) in sample	1990 (84)	2158 (110)	4148 (194)
Household income:
Top three fifths	933	1019	1952	57.0	56.8
Bottom two fifths	745	729	1474	43.0	43.2
No (deaths) in sample	1678 (76)	1748 (89)	3426 (194)
Housing tenure:
Owner occupier	886	776	1662	45.5	45.6
Other	910	1084	1994	54.5	54.4
No (deaths) in sample	1796 (79)	1860 (92)	3656 (171)