Table 2 Tobacco cigarette and EC use characteristics
From: Electronic cigarette use behaviors and motivations among smokers and non-smokers
| Â | Former smoker | Current smoker | Â | Never smoker |
|---|---|---|---|---|
| Â | NÂ =Â 237 N (%) | NÂ =Â 64 N (%) | p-value* | NÂ =Â 19 N (%) |
Tobacco cigarette use | Â | Â | Â | Â |
Age started smoking | Â | Â | Â | Â |
  < 18 years | 153 (65) | 46 (73) | 0.15 | N/A |
 18 or older | 84 (35) | 17 (27) |  |  |
Daily cigarette consumptiona | Â | Â | Â | Â |
 0–10 cigarettes | 30 (13) | 28 (47) | <.01 | N/A |
 11–20 cigarettes | 98 (43) | 20 (33) |  |  |
 More than 20 cigarettes | 98 (43) | 12 (20) |  |  |
EC use | Â | Â | Â | Â |
Length of EC use | Â | Â | Â | Â |
 About 6 months or less | 36 (15) | 17 (27) | 0.04 | 6 (32) |
 About 1 year | 47 (20) | 17 (27) |  | 9 (47) |
 Between 1 and 2 years | 83 (35) | 19 (30) |  | 3 (16) |
 2 years or more | 71 (30) | 11 (17) |  | 1 (5) |
EC use per day | Â | Â | Â | Â |
 1–3 times per day | 12 (5) | 2 (3) | 0.52 | 4 (21) |
 4 or more times per day | 219 (95) | 62 (97) |  | 15 (79) |
Use different nicotine concentrations | Â | Â | Â | Â |
 Yes | 36 (15) | 8 (13) | 0.59 | 1 (5) |
Primary nicotine concentration (mg/ml) | Â | Â | Â | Â |
 Missing | 44 (19) | 24 (38) | 0.04 | 7 (37) |
 Low <6 | 73 (31) | 18 (28) |  | 9 (47) |
 Medium 6–15 | 90 (38) | 18 (28) |  | 2 (11) |
 High >15 | 30 (13) | 4 (6) |  | 1 (5) |
Primary motive for using ECs | Â | Â | Â | Â |
 Aid to quit smoking | 100 (42) | 25 (39) | 0.12 | NA |
 Cheaper than tobacco cigarettes | 8 (3) | 6 (9) |  | 0 (0) |
 Healthier than tobacco cigarettes | 89 (38) | 21 (33) |  | 1 (5) |
 Enjoyment | 30 (13) | 6 (9) |  | 13 (68) |
 Other | 10 (4) | 6 (9) |  | 5 (26) |
Plan to reduce the nicotine in ECs | Â | Â | Â | Â |
 Yes | 184 (78) | 53 (83) | 0.66 | 6 (31) |
Time from wakening to first EC | Â | Â | Â | Â |
 Less than 30 min | 143 (62) | 39 (64) | 0.64 | 3 (16) |
Plan to quit using ECs | Â | Â | Â | Â |
 Yes | 94 (40) | 29 (45) | 0.72 | 4 (21) |