TABLE 1—

Percentage of Persistent Smokers^a by Socioeconomic Position^b From Birth to 41 Years of Age

		Social Class
Age, y	nc	I & II	III NM	III M	IV & V	ORd (95% CI)
Men
0	2889	13.3	15.0	18.0	23.8	1.27 (1.15, 1.40)
7	2928	12.2	15.5	19.4	22.0	1.27 (1.16, 1.40)
11	2898	13.4	11.2	18.8	23.6	1.29 (1.17, 1.41)
16	2945	14.4	11.3	19.5	22.7	1.23 (1.13, 1.35)
23	2936	9.3	13.9	21.6	29.8	1.62 (1.47, 1.79)
33	2917	12.2	13.8	22.8	29.0	1.45 (1.33, 1.58)
41	2840	10.9	11.7	23.7	28.0	1.53 (1.40, 1.67)
Women
0	3242	10.9	15.3	18.9	27.4	1.45 (1.32, 1.60)
7	3277	11.2	17.1	20.0	25.6	1.38 (1.26, 1.51)
11	3245	11.6	15.8	19.9	25.9	1.38 (1.27, 1.51)
16	3277	11.1	14.6	20.7	26.6	1.43 (1.31, 1.56)
23	3376	11.5	16.8	23.4	34.8	1.60 (1.47, 1.74)
33	3195	13.3	16.8	27.1	27.6	1.37 (1.27, 1.48)
41	2812	12.3	18.4	23.8	27.4	1.38 (1.27, 1.50)

Note. NM = nonmanual; M = manual; OR = odds ratio; CI = confidence interval.

^aSmokers at 23, 33, and 41 years of age.

^bSocial class at different ages is based on father’s social class at birth and at 7, 11, and 16 years of age and participant’s social class at 23, 33, and 41 years of age.

^cAt each age, the maximum sample with full data on smoking and social class was used, and those with missing data were omitted. Hence, the sample size varies slightly at each age because of missing data on social class.

^dOdds ratios for persistent smoking for each unit increase in social class.