Table 3.

Subgroup analysis stratified by independent variables.

Variables	Smoking
	Family Type
	Both South Korean parents	South Korean mother–Foreign father		South Korean father–Foreign mother		Both Foreign parents
	OR	OR	95% CI	OR	95% CI	OR	95% CI
Boys
Depression
Yes	1.00	2.85	(1.05–7.70)	1.22	(0.79–1.87)	2.28	(1.21–4.28)
No	1.00	0.81	(0.33–1.97)	0.92	(0.69–1.22)	2.59	(1.62–4.13)
Suicide ideation
Yes	1.00	2.22	(0.53–9.17)	1.73	(0.94–3.20)	4.32	(1.75–10.62)
No	1.00	1.08	(0.51–2.30)	0.91	(0.71–1.18)	2.17	(1.40–3.36)
Girls
Depression
Yes	1.00	2.15	(0.53–8.71)	1.73	(0.93–3.23)	3.82	(1.55–9.40)
No	1.00	1.04	(0.49–2.23)	0.91	(0.71–1.18)	2.13	(2.13–3.29)
Suicide ideation
Yes	1.00	2.89	(0.69–12.55)	1.37	(0.85–2.22)	4.70	(1.90–11.60)
No	1.00	2.28	(0.83–6.27)	1.53	(1.07–2.19)	3.44	(1.99–5.94)