Table 3.
Mean difference (95% CI) in e-cigarette use patterns by demographic characteristics analyzed using linear regression (N=150) a
| Characteristic | Voltage (V) | Nicotine use (mg/mL) | E-liquid/week (mL) | Puff count/day b | Seconds/puff b | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | OR (95% CI) | AOR (95% CI) | N | OR (95% CI) | AOR (95% CI) | N | OR (95% CI) | AOR (95% CI) | N | OR (95% CI) | AOR (95% CI) | N | OR (95% CI) | AOR (95% CI) | |||
| Age (per year) | 92 | -0.01 (-0.04, 0.02) | -0.01 (-0.03, 0.02) | 98 | 0.24 (0.13, 0.34) | 0.24 (0.12, 0.36) | 98 | -0.04 (-1.10, 1.02) | -0.46 (-1.55, 0.63) | 50 | -20.3 (-43.0, 2.39) | -25.1 (-49.9, -0.25) | 50 | 0.01 (-0.05, 0.08) | 0.02 (-0.06, 0.09) | ||
| Gender | |||||||||||||||||
| Male | 65 | 0.00 (Ref.) | 0.00 (Ref.) | 66 | 0.00 (Ref.) | 0.00 (Ref.) | 67 | 0.00 (Ref.) | 0.00 (Ref.) | 35 | 0.00(Ref.) | 0.00(Ref.) | 35 | 0.00(Ref.) | 0.00 (Ref.) | ||
| Female | 27 | -0.46(-1.00, 0.07) | -0.54(-1.04, -0.03) | 32 | 0.04(-2.24, 2.33) | 0.20(-1.95, 2.34) | 31 | -23.5(-43.9, -3.11) | -22.7(-42.9, -2.46) | 15 | -103.4(-553, 347) | -132.2(-49.9, -0.25) | 15 | 0.34(-0.88, 1.57) | 0.40 (-0.92, 1.73) | ||
| Education | |||||||||||||||||
| ≤HS | 38 | 0.00 (Ref.) | 0.00 (Ref.) | 41 | 0.00 (Ref.) | 0.00 (Ref.) | 41 | 0.00 (Ref.) | 0.00 (Ref.) | 19 | 0.00(Ref.) | 0.00(Ref.) | 19 | 0.00 (Ref.) | 0.00 (Ref.) | ||
| >HS | 54 | -0.13 (-0.63, 0.37) | -0.12 (-0.60, 0.36) | 57 | -0.90 (-3.07, 1.27) | -0.02 (-2.09, 2.04) | 57 | -20.3 (-39.6, -0.93) | -20.4 (-39.7, -1.09) | 31 | 202.8(-219, 625) | 134.1(-301, 570) | 31 | -0.23 (-1.38, 0.93) | -0.25 (-1.50, 1.01) | ||
| Race | |||||||||||||||||
| White | 84 | 0.00 (Ref.) | 0.00 (Ref.) | 86 | 0.00 (Ref.) | 0.00 (Ref.) | 87 | 0.00 (Ref.) | 0.00 (Ref.) | 43 | 0.00(Ref.) | 0.00(Ref.) | 43 | 0.00(Ref.) | 0.00 (Ref.) | ||
| Non-White | 8 | -0.13 (-1.00, 0.75) | -0.19 (-1.03, 0.65) | 12 | -2.22 (-5.47, 1.01) | -1.12 (-4.22, 1.98) | 11 | -25.0 (-55.5, 5.48) | -25.5 (-55.8, 4.73) | 7 | -245(-837, 346) | -342(-968, 284) | 7 | 0.09(-1.53, 1.71) | 0.07 (-1.74, 1.87) | ||
| Previous smoker | |||||||||||||||||
| No | 10 | 0.00 (Ref.) | 0.00 (Ref.) | 11 | 0.00 (Ref.) | 0.00 (Ref.) | 11 | 0.00 (Ref.) | 0.00 (Ref.) | 6 | 0.00(Ref.) | 0.00(Ref.) | 6 | 0.00 (Ref.) | 0.00 (Ref.) | ||
| Yes | 82 | -1.28 (-2.03, -0.54) | -1.31 (-2.10, -0.53) | 87 | 0.75 (-2.64, 4.14) | -1.09 (-4.38, 2.19) | 87 | 0.17 (-30.7, 31.1) | -3.10 (-33.9, 27.7) | 44 | 39.5(-597, 676) | 247(-423, 919) | 44 | -1.04 (-1.84, 1.63) | -0.14 (-2.08, 1.79) | ||
a
Participants were recruited from Maryland from December 2015 – October 2017.
b
Only year 2 data. OR: odds ratio. AOR: adjusted odds ratio, adjusted for age, gender, education level, race, and previous smoking status. HS: High school.