Table 4.

Additive interactive effects of adulthood experiences and teacher 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
	Has not seen teacher smoking		Seen teacher smoking
	Non-current/ current	AOR a (95% CI)	Non-current/ current	AOR a (95% CI)
Tall staturea
No	75155/4038	1 (Ref.)	42470/5737	1.68 (1.60–1.78)	0.13 (-0.18–0.43), 0.415
Yes	4074/243	1.23 (1.06–1.42)	2714/424	2.04 (1.80–2.31)
Sexual developmentb
Normal	78120/4225	1 (Ref.)	44325/6020	1.66 (1.58–1.76)	0.71 (0.28–1.15), 0.001
Precocious	3116/227	1.40 (1.18–1.66)	1983/526	2.78 (2.42–3.19)
Residential statusc
With parents	79761/4323	1 (Ref.)	45430/6303	1.68 (1.59–1.77)	0.68 (0.11–1.24), 0.019
Away from parents	1475/129	1.15 (0.92–1.45)	878/243	2.50 (2.05–3.06)
Job experienced
No	74352/2453	1 (Ref.)	40596/3196	1.58 (1.49–1.68)	2.12 (1.66–2.58), <0.001
Yes	6884/1999	4.23 (3.89–4.60)	5712/3350	6.93 (6.42–7.47)

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.