TABLE 3

Association Between Selected Psychosocial Characteristics and Past or Current E-cigarette Use: Southern California CHS, 2014

Total, N (%)Never Users, n (%)Past Users, n (%)Current Users, n (%)OR (95% CI)a
Past Versus Never E-cigarette UsersCurrent Versus Never E-cigarette Users
Total, N (%)1585 (76.0)299 (14.4)200 (9.6)
Anyone living at home use e-cigarettes?
 No1829 (87.8)1461 (92.2)236 (78.9)132 (66.0)RefRef
 Yes241 (11.6)115 (7.3)58 (19.4)68 (34.0)3.23 (2.25–4.63)6.80 (4.71–9.83)**
 Missing14950
Anyone living at home use cigarettes?
 No1638 (78.6)1297 (81.8)217 (72.6)124 (62.0)RefRef
 Yes433 (20.8)280 (17.7)77 (25.8)76 (38.0)1.54 (1.14–2.09)2.79 (2.01–3.86)**
 Missing13850
Number of friends who use e-cigarettes
 01410 (67.7)1265 (79.8)121 (40.5)24 (12.0)RefRef
 1 or 2308 (14.8)156 (9.8)98 (32.8)54 (27.0)6.23 (4.50–8.63)18.7 (11.1–31.4)***
 3 or 4205 (9.8)54 (3.4)52 (17.4)99 (49.5)9.21 (5.93–14.3)104 (60.5–179)***
 Missing1611102823
 Trend3.72 (3.03–4.55)11.2 (8.64–14.6)***
Number of friends who use cigarettes
 01513 (72.6)1267 (79.9)163 (54.5)83 (41.5)RefRef
 1 or 2325 (15.6)166 (10.5)80 (26.8)79 (39.5)3.56 (2.58–4.93)7.46 (5.21–10.7)***
 3 or 485 (4.1)31 (2.0)32 (10.7)22 (11.0)6.87 (4.00–11.8)11.2 (6.06–20.7)
 Missing1611212416
 Trend3.14 (2.49–3.95)4.57 (3.54–5.89)*
Best friends’ reactions to e-cigarette use
 Unfriendlyb1172 (56.2)1087 (68.6)68 (22.7)17 (8.5)RefRef
 Friendly630 (30.2)358 (22.6)163 (54.5)109 (54.5)6.82 (4.97–9.36)18.6 (10.9–31.6)**
 Very friendly265 (12.7)128 (8.1)64 (21.4)73 (36.5)7.39 (4.96–11.0)37.0 (20.9–65.5)***
 Missing171241
 Trend3.18 (2.64–3.83)5.67 (4.50–7.15)***
Best friends’ reactions to cigarette use
 Unfriendlyb1415 (67.9)1159 (73.1)154 (51.5)102 (51.0)RefRef
 Friendly487 (23.4)306 (19.3)109 (36.5)72 (36.0)2.54 (1.91–3.38)2.51 (1.80–3.51)
 Very friendly167 (8.0)109 (6.9)33 (11.0)25 (12.5)2.07 (1.33–3.21)2.40 (1.80–3.51)
 Missing151131
 Trend1.72 (1.43–2.07)1.80 (1.45–2.23)
Are e-cigarettes bad for your health?
 Strongly agree1324 (63.5)1150 (72.6)134 (44.8)40 (20.0)RefRef
 Agree455 (21.8)304 (19.2)87 (29.1)64 (32.0)2.50 (1.84–3.40)6.02 (3.95–9.18)***
 Disagreec291 (14.0)119 (7.5)76 (25.4)96 (48.0)5.43 (3.81–7.75)23.5 (15.3–36.1)***
 Missing141220
 Trend2.37 (2.00–2.82)4.83 (3.92–5.95)***
Are cigarettes bad for your health?
 Strongly agree1784 (85.6)1376 (86.8)257 (86.0)151 (75.5)RefRef
 Agree260 (12.5)172 (10.9)41 (13.7)47 (23.5)1.19 (0.82–1.74)2.35 (1.62–3.43)*
 Disagreec30 (1.4)28 (1.8)02 (1.0)
 Missing14910
  • Ref, reference; —, analysis not possible due to small cell count.

  • a Adjusted for community and coadjusted for gender, ethnicity, income, and highest parental education, as appropriate. P values for test of difference in effect estimates: *P < .05, **P < .005, ***P < .0005.

  • b Very unfriendly or unfriendly.

  • c Disagree or strongly disagree.