Table I.
Participant characteristics.
| COPD | Asymptomatic smokers | |||||
|---|---|---|---|---|---|---|
|
|
|
|||||
| Characteristics | Intervention group, n=94 | Control group, n=96 | Intervention group, n=42 | Control group, n=43 | Intervention group, n=52 | Control group, n=53 |
| Age, years | 50.8±13.9 | 50.3±13.2 | 61.4±8.6 | 61.6±7.7 | 41.7±10.1a | 41.6±9.8b |
| Male:female | 91:3 | 93:3 | 41:1 | 41:2 | 50:2 | 52:1 |
| Pack-years | 31.6±18.8 | 32.6±20.4 | 40.2±18.2 | 44.3±15.9 | 23.7±15.4a | 24.0±19.4b |
| Daily cigarettes | 19.0±10.3 | 20.6±12.7 | 17.5±8.4 | 17.2±9.6 | 22.4±10.6 | 23.6±13.9 |
| Carbon monoxide, ppm | 15.1±8.2 | 16.1±8.2 | 14.2±7.3 | 14.1±8.5 | 17.5±8.4 | 18.3±9.2 |
| FTND, points | 4.1±2.4 | 4.2±2.3 | 4.0±2.0 | 4.1±2.5 | 4.2±2.1 | 4.3±2.4 |
| Education, n | ||||||
| Junior high school or less | 40 | 34 | 28 | 20 | 12 | 14 |
| Senior high school | 23 | 23 | 10 | 14 | 13 | 9 |
| College or more | 31 | 39 | 4 | 9 | 27 | 30 |
| Quitting motivation, n | ||||||
| No desire to quit | 17 | 18 | 3 | 3 | 14 | 15 |
| Indifference | 27 | 26 | 5 | 5 | 22 | 21 |
| Hoping to quit | 37 | 39 | 23 | 24 | 14 | 15 |
| Hoping very much to quit | 13 | 13 | 11 | 11 | 2 | 2 |
a
P<0.05, vs. COPD intervention group;
b
P<0.05, vs. COPD control group.
Pack-years were calculated by multiplying the number of packs of cigarettes smoked per day by the number of years the individual had smoked. COPD, chronic obstructive pulmonary disease; FTND, Fagerström Test for Nicotine Dependence.