Table 4.

Mean overall difference in probability of current smoking between ethnic groups.

	Men				Women
	OR	LCI	UCI	p	OR	LCI	UCI	p
Model 1b (overall difference between South-Asian and Caucasian group)
Ethnic group difference^	0.48	0.38	0.60	<0.001	0.03	0.01	0.08	<0.001
Model 2b (trends by ethnic group)
Caucasian*	0.96	0.95	0.96	<0.001	0.97	0.96	0.98	<0.001
South-Asian*	1.01	0.93	1.09	0.858	1.42	0.99	2.04	0.059
Model 3b (Time trend difference between South-Asian and Caucasian group)
Interaction ethnic group × time**	1.07	0.99	1.15	0.093	1.49	1.04	2.14	0.032

OR: Odds Ratio, UCI: Upper Confidence Interval, LCI: Lower Confidence Interval

^ adjusted for age and test year

* adjusted for age, stratified by ethnic group

**adjusted for age, test year, ethnic group and interaction term "ethnic group × test year"