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. Author manuscript; available in PMC: 2015 Jan 1.
Published in final edited form as: Addict Behav. 2013 Sep 17;39(1):338–340. doi: 10.1016/j.addbeh.2013.09.014

Table 2.

Predictors of Past-30 day ENDS Use by Study Wave

February 2010 October 2010 June 2011
Crude OR (95% CI) Adj. OR (95% CI) Crude OR (95% CI) Adj. OR (95% CI) Crude OR (95% CI) Adj.OR (95% CI)
School A/NY Ref Ref Ref Ref Ref Ref
School B/CT 0.76 (0.28–2.04) 1.16 (0.40–3.43) 0.52 (0.24–1.12) 0.48 (0.21–1.10) 1.01 (0.48–2.02) 1.14 (0.51–2.55)
9th Ref Ref Ref Ref Ref Ref
10th 1.71 (0.41–7.18) 1.24 (0.27–5.61) 0.06 (0.36–2.61) 0.73 (0.24–2.18) 0.82 (0.30–2.20) 0.34 (0.10–1.10)
11th 0.40 (0.04–3.90) 0.21 (0.02–2.16) 1.13 (0.43–2.96) 0.59 (0.20–1.68) 0.71 (0.26–1.91) 0.28 (0.08–0.95)
12th 3.07 (0.8–12.0) 2.44 (0.57–10.4) 0.64 (0.19–2.14) 0.28 (0.08–0.99) 0.82 (0.30–2.20) 0.39 (0.12–1.24)
Male Ref Ref Ref Ref Ref Ref
Female 0.70 (0.26–1.89) 1.01 (0.34–2.96) 0.80 (0.38–1.66) 0.93 (0.42–2.07) 0.67 (0.32–1.41) 0.76 (0.34–1.69)
Non-white Ref Ref Ref Ref Ref Ref
White 4.56 (1.65–12.62) 3.92 (1.30–11.78) 1.28 (0.59–2.78) 0.89 (0.38–2.06) 1.92 (0.94–3.94) 1.25 (0.55–2.81)
Non-smoker Ref Ref Ref Ref Ref Ref
Smokers 57.17 (12.9–253.2) 55.63 (12.58–254.9) 45.52 (17.13–121.0) 54.89 (20.04–150.03) 38.47 (14.56–101.6) 54.50 (17.93–165.9)