Table 3.

Factors associated with using cigarettes and electronic cigarettes in AYA in 25 countries (N = 6,989).

Factors		Regular cigarettes				Electronic cigarettes
		UOR (95% CI)	P -value	AOR (95% CI)	P -value	UOR (95% CI)	P -value	AOR (95% CI)	P -value
Age	18–23	4.96 (3.00, 8.19)	<0.001	5.70 (3.58, 9.06)	<0.001	2.88 (1.71, 4.83)	<0.001	2.88 (1.92, 4.31)	<0.001
	15–17	1.99 (1.14, 3.46)	0.02	2.28 (1.29, 4.02)	0.005	2.14 (1.22, 3.76)	0.008	2.25 (1.36, 3.72)	0.002
	11–14	1.00	–	1.00	–	1.00	–	1.00	–
Sex	Male	5.32 (4.41, 6.41)	<0.001	5.96 (4.31, 8.24)	<0.001	2.19 (1.76, 2.73)	<0.001	2.31 (1.55, 3.46)	<0.001
	Female	1.00	–	1.00	–	1.00	–	1.00	–
COVID-19 positive	Yes	1.14 (0.87, 1.49)	0.33	1.01 (0.75, 1.35)	0.97	1.95 (1.42, 2.66)	<0.001	1.81 (1.12, 2.92)	0.02
	No	1.00	–	1.00	–	1.00	–	1.00	–
General anxiety categories	Normal	0.47 (0.36, 0.63)	<0.001	0.34 (0.26, 0.46)	<0.001	0.34 (0.24, 0.49)	<0.001	0.28 (0.19, 0.43)	<0.001
	Mild	0.60 (0.45, 0.78)	<0.001	0.52 (0.44, 0.62)	<0.001	0.49 (0.35, 0.69)	<0.001	0.45 (0.30, 0.67)	<0.001
	Moderate	0.93 (0.68, 1.26)	0.63	0.95 (0.69, 1.30)	0.73	0.74 (0.50, 1.08)	0.12	0.69 (0.40, 1.21)	0.19
	Severe	1.00	–	1.00	–	1.00	–	1.00	–
Attitude score		0.74 (0.69, 0.78)	<0.001	0.75 (0.70, 0.80)	<0.001	0.78 (0.72, 0.84)	<0.001	0.78 (0.71, 0.86)	<0.001
Affordability score		0.99 (0.92, 1.07)	0.85	0.96 (0.92, 1.01)	0.09	0.90 (0.81, 0.99)	0.04	0.90 (0.83, 0.97)	0.004
Score of banning promotion on TV		1.21 (0.68, 2.15)	0.51	1.02 (0.53, 1.97)	0.94	0.59 (0.29, 1.22)	0.16	0.56 (0.25, 1.23)	0.15
Smoke free zones score		1.12 (0.90, 1.40)	0.31	1.17 (0.92, 1.49)	0.20	1.02 (0.75 1.38)	0.91	1.21 (0.96, 1.51)	0.10

UOR: unadjusted odds ratio, AOR: adjusted odds ratio, CI: confidence interval.

In the adjusted models, the independent variables were mutually adjusted for each other.