Characteristics of NIS among adult smokers in California, 2011 (n=1698)
| Characteristic | Unweighted sample frequency | Weighted (population) frequency (SD) | Weighted (population) per cent (SE) | Weighted OR (CI) | Weighted adjusted OR* (CI) |
|---|---|---|---|---|---|
| Total NIS† | 146 | 395 928 (54 126) | 100 | – | – |
| Age | |||||
| 18–44 | 39 | 256 106 (49 101) | 64.7 (6.3) | Ref | Ref |
| 45–64 | 76 | 84 743 (18 013) | 21.4 (4.3) | 0.44 (0.23 to 0.84) | 0.70 (0.29 to 1.67) |
| 65+ | 31 | 55 080 (16 732) | 13.9 (4.3) | 1.21 (0.51 to 2.90) | 3.35 (1.16 to 9.75) |
| Sex | |||||
| Male | 67 | 260 560 (42 101) | 65.8 (5.7) | Ref | Ref |
| Female | 79 | 135 369 (29 289) | 34.2 (5.7) | 0.84 (0.48 to 1.47) | 0.73 (0.29 to 1.83) |
| Ethnicity | |||||
| Non-Hispanic white | 80 | 81 866 (24 282) | 20.7 (6.6) | Ref | Ref |
| Hispanic | 34 | 118 155 (28 970) | 29.8 (6.1) | 2.53 (1.10 to 5.86) | 1.43 (0.44 to 4.61) |
| All others‡ | 32 | 195 908 (51 150) | 49.5 (9.2) | 6.71 (2.38 to 18.9) | 4.09 (1.53 to 14.8) |
| Education (years) | |||||
| ≤12 | 42 | 151 180 (37 039) | 38.2 (7.1) | Ref | Ref |
| 13–15 | 35 | 62 337 (16 988) | 15.7 (4.3) | 0.45 (0.20 to 1.01) | 0.39 (0.15 to 1.02) |
| 16+ | 69 | 182 411 (37 634) | 46.1 (7.0) | 2.40 (1.11 to 5.23) | 1.35 (0.57 to 3.20) |
| Smoking status§ | |||||
| Current daily | 33 | 87 156 (26 808) | 22.0 (5.9) | Ref | Ref |
| Current non-daily (ever daily ≥6 months) | 72 | 185 552 (42 918) | 46.9 (9.4) | 10.40 (4.10 to 26.4) | 7.63 (2.67 to 21.8) |
| Current non-daily (never daily ≥6 months) | 41 | 123 221 (38 150) | 31.1 (8.4) | 19.03 (6.96 to 52.0) | 7.14 (2.78 to 18.3) |
| Are you addicted? | |||||
| Yes | 52 | 149 220 (32 687) | 37.7 (7.6) | Ref | Ref |
| No | 93 | 246 642 (49 684) | 62.3 (7.6) | 8.54 (4.05 to 17.99) | 4.09 (1.65 to 10.1) |
| Quit attempt in the last 12 months?¶ | |||||
| Yes | 99 | 253 768 (51 885) | 65.1 (8.6) | Ref | Ref |
| No | 46 | 135 814 (36 761) | 34.8 (8.6) | 1.25 (0.61 to 2.57) | 1.22 (0.59 to 2.53) |
*Model OR adjusts for all covariates.
†NIS in our study is defined as smoking 100 cigarettes in one's lifetime, at least ‘some days’, smoking 1 day in the 30 days preceding interview and answering ‘no’ to the question: Do you consider yourself a smoker?
‡Includes Black, Asian and all other categories of minorities except Hispanic.
§Frequency of smoking was derived using two questions that asked whether an individual ‘smoked cigarettes every day, some days or not at all’ and ‘ever smoked daily for 6 months or more’.
¶Quit attempt was also derived using combination of variables that asked whether individuals had ‘ever made a quit attempt’ and ‘the start date of their last quit attempt’.
NIS, non-identifying smokers.