Table 3.

Additive interactive effect of adulthood experiences and parental smoking on the risk of adolescent current cigarette smoking, data from 2014 and 2015 Korea Youth Risk Behavior Survey (N=138542)

Adulthood experiences	Current cigarette smoking				RERI (95% CI), p
	Non-smoking parents		Smoking parents
	Non-current/ current	AOR a (95% CI)	Non-current/ current	AOR a (95% CI)
Tall staturea
No	63344/4448	1 (Ref.)	54281/5327	1.22 (1.16–1.28)	-0.23 (-0.48–0.02), 0.073
Yes	3625/339	1.38 (1.21–1.58)	3163/328	1.37 (1.21–1.56)
Sexual developmentb
Normal	65891/4705	1 (Ref.)	56554/5540	1.21 (1.16–1.27)	-0.06 (-0.42–0.31), 0.761
Precocious	2622/398	1.68 (1.45–1.95)	2477/355	1.83 (1.58–2.13)
Residential statusc
With parents	67426/4929	1 (Ref.)	57765/5697	1.21 (1.16–1.27)	-0.25 (-0.66–0.17), 0.251
Away from parents	1087/174	1.51 (1.23–1.86)	1266/198	1.47 (1.21–1.79)
Job experienced
No	62626/2743	1 (Ref.)	52322/2906	1.18 (1.12–1.25)	0.41 (0.06–0.76), 0.022
Yes	5887/2360	4.49 (4.18–4.82)	6709/2989	5.08 (4.72–5.47)

Covariates adjusted for all models are: age (continuous), sex (male/female), school type (middle/general high/vocational high), close friends smoking (yes/no), participation in smoking prevention education (yes/no), perceived household wealth (high/mid/low), and perceived academic performance (high/mid/low).

^aAdjusted for sexual development (normal/precocious), residential status (with/away from parents), job experience (yes/no) and the covariates.

^bAdjusted for tall stature (yes/no), residential status (with/away from parents), job experience (yes/no) and the covariates.

^cAdjusted for tall stature (yes/no), sexual development (normal/precocious), job experience (yes/no) and the covariates.

^dAdjusted for tall stature (yes/no), sexual development (normal/precocious), residential status (with/away from parents) and the covariates. AOR: adjusted odds ratio. RERI: relative excess risk due to interaction.