Gender and age differences among current smokers in a general population survey

BMC Public Health

Table 3 Prediction of current smoking; logistic regression analysis

	Current smoker
	Odds ratio	Confidence interval*
Age
10 – 19	ref.
20 – 29	0.3	0.25 – 0.40
30 – 39	0.2	0.140 – 0.225
40 – 49	0.1	0.093 – 0.150
50 – 59	0.07	0.055 – 0.088
60 – 69	0.04	0.031 – 0.050
70 – 79	0.02	0.016 – 0.026
80 – 89	0.015	0.011 – 0.020
90 or older	0.013	0.006 – 0.026
Gender
Male	ref.
Female	1.2	0.96 – 1.4
Age by gender
10 – 19, female	ref.
20 – 29, female	1.3	0.8 – 2.1
30 – 39, female	1.5	0.9 – 2.4
40 – 49, female	1.7	1.1 – 2.8
50 – 59, female	2.2	1.4 – 3.5
60 – 69, female	2.8	1.7 – 4.5
70 – 79, female	3.0	1.9 – 5.0
80 – 89, female	4.3	2.4 – 7.6
90 or older, female	6.9	1.7 – 28.3
Age of onset of smoking
10 – 15	ref.
16	1.0	0.92 – 1.04
17 – 18	1.0	0.98 – 1.1
19 – 20	1.2	1.16 – 1.3
21 – 25	1.4	1.3 – 1.5
26 – 70	2.0	1.8 – 2.2
Age of onset of smoking by gender
10 – 15, female	ref.
16, female	1.0	0.9 – 1.1
17 – 18, female	1.1	0.96 – 1.2
19 – 20, female	1.2	1.04 – 1.4
21 – 25, female	0.9	0.8 – 1.1
26 – 70, female	1.1	0.9 – 1.3
Cigarettes per day
less than 5	0.54	0.52 – 0.57
5 – 20	ref.
21 – 40	1.2	1.1 – 1.3
41 or more	0.4	0.38 – 0.5
Cigarettes per day by gender
less than 5, female	0.7	0.6 – 0.8
5 – 20, female	ref.
21 – 40, female	1.1	0.97 – 1.2
41 or more, female	1.1	0.8 – 1.5
Disease (last 4 weeks)
not diseased	ref.
diseased, 1 year or less	0.8	0.78 – 0.9
diseased, more than 1 year	0.8	0.7 – 0.9
Disease by gender
not diseased, female	ref.
diseased, 1 year or less, female	1.0	0.9 – 1.1
diseased, more than 1 year, female	1.0	0.8 – 1.1

N = 58,984 ever smokers.
Logistic regression analysis, odds ratios adjusted for school education (years) and household income per household member. All variables in the table were entered into the model in addition to school education and household income per household member.
* 95 %.
ref. Reference category.

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