Table 4.

Odds ratios (with 95% CIs) for primary and secondary outcomes among pupils in England between 2014 and 2016, overall and by gender, age, and smoking status

		Ever use of e-cigarettes		Regular use of e-cigarettes
			P		P
All (n=8,178)	Time	1.15 [1.10, 1.22]	<0.001	1.47 [1.25, 1.73]	<0.001
Boys (n=3,994)	Time	1.18 [1.10, 1.27]	<0.001	1.64 [1.33, 2.03]	<0.001
Girls (n=4,184)	Time	1.12 [1.04, 1.21]	0.002	1.19 [0.91, 1.54]	0.204
13 year olds (n=3,987)	Time	1.14 [1.05, 1.24]	0.002	1.56 [1.16, 2.11]	0.004
15 year olds (n=4,191)	Time	1.16 [1.09, 1.24]	<0.001	1.43 [1.17, 1.73]	<0.001
Never smoker (n=6,160)	Time	1.16 [1.08, 1.25]	<0.001	1.55 [0.96, 2.52]	0.074
Ever smoker (n=1,911)	Time	1.32 [1.18, 1.47]	<0.001	1.52 [1.26, 1.82]	<0.001

Note: where appropriate, models adjusted for gender and/or age