Table 4

Change in behavioural risk factors by social class, with comparison of RII

Behavioural risk factors	Year		Number		Erikson-Goldthorpe class		RII (95% CI)		RII change^4-150
Behavioural risk factors	Year		Number		1 Higher professional and managerial	2 Lower professional and managerial	RII (95% CI)		RII change^4-150	3 Routine non-manual	4 Skilled manual	5 Semi and non-skilled
% Current smokers	1984	2181	24.5	24.2	29.8	40.1	50.8	5.6 (4.02, 7.80)	t=1.33
% Current smokers	1993	4715	19.7	25.0	27.7	37.9	42.0	4.29 (3.41, 5.40)	p=0.18
% Eating veg less than once per day	1984	2179	30.9	36.3	36.8	39.6	41.6	1.76 (1.29, 2.40)	t=0.54
% Eating veg less than once per day	1993	4702	32.4	34.6	38.0	41.1	42.9	1.96 (1.58, 2.42)	p=0.59
% Drinking high fat milk	1984	2151	81.7	81.9	79.2	89.2	91.1	3.87 (2.46, 6.07)	t=0.21
% Drinking high fat milk	1993	4496	27.7	32.7	34.6	44.7	51.1	3.66 (2.94, 4.57)	p=0.83
% Whose main bread is not wholemeal	1984	2159	67.5	68.8	69.6	82.7	89.1	6.24 (4.24, 9.19)	t=1.69
% Whose main bread is not wholemeal	1993	4321	65.1	70.8	69.1	82.5	83.4	4.19 (3.24, 5.42)	p=0.09
% Eating fruit less than once per day	1984	2181	61.0	66.1	72.3	68.8	72.3	1.91 (1.38, 2.64)	t=0.98
% Eating fruit less than once per day	1993	4716	56.2	56.3	60	60.9	64.2	1.57 (1.27, 1.94)	p=0.34
% Not participating in any sport	1984	2176	37.2	46.8	45.3	54.1	60.0	3.36 (2.43, 4.64)	t=0.07
% Not participating in any sport	1993	4723	32.7	36.3	45	47.8	51.4	3.31 (2.66, 4.11)	p=0.94
% With severe lack of social support	1984	2181	10.3	10.7	10.5	14.3	14.8	1.92 (1.22, 3.02)	t=1.03
% With severe lack of social support	1993	4642	13.0	14.8	15.1	16.6	23.1	2.53 (1.92, 3.35)	p=0.30