. 2022 Apr;112(4):650–661. doi: 10.2105/AJPH.2021.306686

TABLE 2—

Prevalence of Past-30-Day E-Cigarette Use Among Youths Aged 12–16 Years by Use Frequency, Sex, Age Group, and WHO Region in 68 Countries and Territories: 2012–2019

Group	No. of Countries or Territories	≥ 1 Day, % (95% CI)			≥ 3 Days, % (95% CI)			≥ 6 Days, % (95% CI)			≥ 10 Days, % (95% CI)
Total	Male	Female	Total	Male	Female	Total	Male	Female	Total	Male	Female
Total	68	9.2 (8.2, 10.2)	11.7 (10.5, 13.0)	6.6 (5.9, 7.2)^a	3.9 (3.4, 4.4)	5.1 (4.4, 5.7)	2.4 (2.1, 2.8)^a	2.2 (1.9, 2.5)	3.0 (2.6, 3.4)	1.3 (1.1, 1.5)^a	1.4 (1.2, 1.6)	2.0 (1.7, 2.3)	0.8 (0.7, 0.9)^a
Age group, y
12–14	68	8.0 (7.1, 8.9)	10.2 (9.0, 11.4)	5.8 (5.1, 6.5)^a	3.0 (2.6, 3.4)	4.1 (3.6, 4.7)	1.8 (1.5, 2.0)^a	1.7 (1.4, 1.9)	2.4 (2.0, 2.7)	1.0 (0.8, 1.1)^a	1.1 (0.9, 1.2)	1.4 (1.2, 1.7)	0.7 (0.5, 0.8)^a
15–16	68	11.2 (9.8, 12.6)^b	13.8 (12.0, 15.5)^b	8.0 (6.9, 9.1)^a^,b	4.9 (4.2, 5.6)^b	6.2 (5.3, 7.1)^b	3.0 (2.5, 3.5)^a^,b	2.8 (2.3, 3.2)^b	3.5 (3.0, 4.1)^b	1.5 (1.2, 1.8)^a^,b	1.8 (1.5, 2.1)^b	2.5 (2.0, 2.9)^b	1.0 (0.8, 1.2)^a^,b
WHO region
Africa	4	9.9 (6.0, 13.9)	12.7 (6.8, 18.6)	6.4 (3.6, 9.2)^a	4.4 (2.3, 6.6)	6.0 (3.2, 8.7)	2.7 (0.7, 4.6)^a	2.8 (1.2, 4.3)	3.5 (1.7, 5.3)	1.7 (0.4, 3.1)^a	1.8 (0.7, 2.8)	2.1 (1.0, 3.3)	1.3 (0.2, 2.4)
Americas	22	7.8 (6.2, 9.5)	9.3 (7.4, 11.1)	6.4 (4.8, 8.0)^a	3.3 (2.5, 4.2)	4.1 (3.1, 5.1)	2.5 (1.8, 3.2)^a	1.9 (1.4, 2.5)	2.4 (1.8, 3.0)	1.3 (0.9, 1.7)^a	1.3 (1.0, 1.6)	1.7 (1.2, 2.1)	0.8 (0.6, 1.1)^a
Eastern Mediterranean	10	10.6 (7.9, 13.4)^c	16.2 (11.7, 20.7)^c	5.9 (4.2, 7.6)^a	3.7 (2.6, 4.8)	6.0 (4.2, 7.8)^c	1.6 (1.1, 2.2)^a^,c	2.0 (1.4, 2.5)	3.2 (2.2, 4.2)	0.9 (0.6, 1.2)^a	1.1 (0.8, 1.4)	1.7 (1.2, 2.1)	0.5 (0.4, 0.7)^a^,c
Europe	19	9.3 (7.3, 11.3)	11.6 (9.3, 13.9)	6.6 (5.2, 8.1)^a	4.3 (3.4, 5.3)	5.7 (4.4, 6.9)^c	2.6 (1.9, 3.2)^a	2.6 (2.0, 3.2)^c	3.6 (2.8, 4.4)^c	1.3 (0.9, 1.7)^a	1.7 (1.3, 2.1)	2.6 (1.9, 3.3)^c	0.8 (0.6, 1.1)^a
Southeast Asia	1	3.3 (2.4, 4.6)	4.7 (3.5, 6.3)	1.9 (1.0, 3.6)^a	1.1 (0.8, 1.6)	2.0 (1.3, 2.9)	0.2 (0.1, 0.9)^a	0.9 (0.5, 1.4)	1.4 (0.9, 2.4)	0.2 (0.1, 0.9)^a	0.4 (0.1, 1.0)	0.7 (0.3, 1.9)	0.0^a
Western Pacific	12	10.8 (8.1, 13.6)^c	13.5 (10.1, 16.9)^c	8.1 (5.9, 10.2)^a	4.6 (3.0, 6.2)	5.6 (3.6, 7.5)	3.2 (2.1, 4.2)^a	2.4 (1.7, 3.2)	3.0 (1.9, 4.1)	1.5 (0.9, 2.1)^a	1.6 (1.0, 2.2)	2.2 (1.3, 3.1)	1.0 (0.6, 1.4)^a

Note. CI = confidence interval; WHO = World Health Organization.

^aThere was a statistically significant difference between sexes.

^bThere was a statistically significant difference between age groups.

^cThere was a statistically significant difference across WHO regions (Americas as Ref).