Table 1.
Demographic and lifestyle characteristics compared by baseline number of cigarettes smoked per day among current and former smokers reporting smoking consistent cigarettes per day (CPD) and current smokers reporting different CPD over the lifetime
| Never smoker | Current - Lifelonga | Former - Lifelongb | Current - Inconsistentc | ||||||
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| < 1 CPD | 1–10 CPD | 11–20 CPD | > 20 CPD | < 1 CPD | 1–10 CPD | < 1 CPD | 1–10 CPD | ||
| N | 93,171 | 137 | 1,243 | 2,254 | 906 | 4,827 | 16,849 | 978 | 3,655 |
| Age started smoking (%d) | |||||||||
| < 15 | NA | 21.9 | 12.3 | 30.0 | 46.6 | 11.9 | 5.7 | 22.1 | 21.7 |
| 15 – 19 | NA | 30.7 | 38.1 | 46.1 | 36.6 | 34.8 | 41.7 | 41.9 | 43.5 |
| 20 – 24 | NA | 23.4 | 29.8 | 16.9 | 11.7 | 30.0 | 37.9 | 27.5 | 27.7 |
| 25 – 29 | NA | 11.0 | 7.9 | 3.1 | 2.0 | 9.7 | 7.8 | 4.2 | 4.4 |
| ≥ 30 | NA | 13.0 | 11.9 | 3.9 | 3.1 | 13.6 | 6.9 | 4.3 | 2.7 |
| Ever regular use of pipe or cigar (%) | 8.6 | 16.1 | 8.7 | 11.3 | 17.7 | 22.0 | 18.6 | 21.3 | 15.5 |
| Agee,f | 70.4 (0.0) | 68.7 (0.4) | 70.0 (0.2) | 69.0 (0.1) | 68.7 (0.2) | 70.2 (0.1) | 70.8 (0.0) | 69.3 (0.2) | 69.4 (0.1) |
| Genderd (%) | |||||||||
| Male | 47.5 | 54.7 | 30.6 | 49.4 | 70.8 | 58.4 | 47.1 | 54.0 | 48.2 |
| Female | 52.5 | 45.3 | 69.4 | 50.6 | 29.3 | 41.6 | 52.9 | 46.0 | 51.8 |
| Raceg (%) | |||||||||
| Non-Hispanic White | 91.4 | 82.5 | 80.7 | 93.6 | 96.4 | 88.9 | 89.1 | 89.0 | 90.9 |
| Non-Hispanic Black | 3.6 | 9.5 | 13.3 | 3.2 | 2.1 | 4.9 | 5.2 | 6.3 | 5.2 |
| Hispanic | 2.0 | 2.9 | 2.2 | 1.0 | 0.8 | 2.9 | 2.5 | 1.7 | 1.5 |
| Asian/Pacific Islander/Native American | 2.0 | 2.9 | 1.9 | 0.9 | 0.1 | 2.1 | 1.8 | 1.5 | 1.3 |
| Educationd (%) | |||||||||
| ≤ High school | 21.9 | 35.0 | 30.3 | 30.4 | 31.2 | 15.3 | 21.8 | 20.5 | 23.3 |
| Post-high school training/some college | 28.6 | 26.3 | 35.5 | 39.8 | 36.3 | 28.0 | 32.0 | 35.9 | 38.3 |
| ≥ College | 47.4 | 34.3 | 30.8 | 26.8 | 30.2 | 54.4 | 43.5 | 41.2 | 36.1 |
| Body mass indexe,f (kg/m2) | 26.9 (0.0) | 27.0 (0.5) | 25.5 (0.1) | 25.8 (0.1) | 26.8 (0.2) | 26.9 (0.1) | 26.8 (0.0) | 27.1 (0.2) | 26.0 (0.1) |
| Familial history of cancer (%) | 56.7 | 52.6 | 56.1 | 57.1 | 56.6 | 56.4 | 56.2 | 57.8 | 57.7 |
| Alcoholic beverage intakee,g (g/d) | 96.5 (1.3) | 134.6 (19.4) | 164.1 (14.8) | 270.8 (21.6) | 407.7 (41.0) | 125.2 (5.8) | 131.2 (3.8) | 234.8 (24.0) | 216.0 (12.8) |
| Physical activitye,f (MET-hrs/wk) | 26.1 (0.1) | 24.6 (3.4) | 21.7 (0.9) | 18.0 (0.6) | 17.2 (1.1) | 27.3 (0.5) | 28.3 (0.3) | 24.8 (1.0) | 21.3 (0.5) |
| Fair/poor self-reported healthf (%) | 9.7 | 11.7 | 11.0 | 16.4 | 25.9 | 9.6 | 10.1 | 14.8 | 16.8 |
| Comorbid conditione,h (%) | |||||||||
| Heart attack | 13.7 | 10.2 | 10.3 | 17.9 | 22.5 | 15.1 | 14.3 | 17.9 | 18.8 |
| Stroke | 2.9 | 2.9 | 3.6 | 4.6 | 5.6 | 3.2 | 2.9 | 4.6 | 4.4 |
| Diabetes | 13.6 | 16.8 | 11.2 | 13.2 | 18.9 | 14.3 | 13.6 | 14.0 | 11.8 |
| COPD | 3.9 | 4.4 | 8.2 | 19.7 | 25.5 | 4.2 | 5.1 | 12.5 | 19.1 |
Current smokes who reported consistent number of cigarettes smoked per day during the lifetime.
Former smokers who reported smoking consistent number of cigarettes per day when they smoked. We show only former smokers who consistently smoked <1 or 1–10 cigarettes per day.
Current smokers whose reported current number of cigarettes smoked per day was different from amounts earlier in their life. We show only those who reported currently smoking <1 or 1–10 cigarettes per day.
Percentages for a “unknown” category for categorical variables were considered in calculation but not shown.
Mean (standard error) for continuous variables
Assessed in the follow-up questionnaire in 2004–2005
Assessed in the cohort baseline questionnaire in 1995–1996
Self-reported ever diagnosis before the follow-up survey in 2004–2005