Table 3.
Smoking Characteristics of Attenders Consenting to LSUT and Eligibility for LDCT
| All (n = 1,000)* | Intervention (n = 492) | Control (n = 508) | |
|---|---|---|---|
| Age started smoking, mean (SD, range) | 17.9 (5.8, 6–55) | 17.9 (5.5, 7–55) | 17.9 (6.1, 6–55) |
| Age stopped smoking†, mean (SD, range) | 59.4 (10.7, 0–75) | 59.8 (10.4, 21–75) | 59.1 (11.0, 0–75) |
| Number of years smoked, mean (SD, range) | 45.5 (9.5, 2–64) | 45.6 (9.1, 2–64) | 45.4 (9.9, 3–63) |
| Pack-years, mean (SD, range) | 39.4 (25.0, 1–171) | 38.0 (22.2, 1–128) | 40.7 (27.5, 1–171) |
| Usual daily cigarette consumption‡,§, % (n) | |||
| 1–10 | 55.7 (395) | 55.3 (199) | 56.2 (196) |
| 11–20 | 33.3 (236) | 34.7 (125) | 31.8 (111) |
| 21–30 | 5.9 (42) | 5.3 (19) | 6.6 (23) |
| ≥31 | 2.3 (16) | 2.2 (8) | 2.3 (8) |
| Missing | 2.8 (20) | 2.5 (9) | 3.2 (11) |
| Time to first cigarette§, % (n) | |||
| Within 5 min | 16.5 (117) | 16.9 (61) | 16.0 (56) |
| 6–30 min | 33.4 (237) | 33.9 (122) | 33.0 (115) |
| 31–60 min | 16.8 (119) | 17.2 (62) | 16.3 (57) |
| >60 min | 31.5 (223) | 31.1 (112) | 31.8 (111) |
| Missing | 1.8 (13) | 0.8 (3) | 2.9 (10) |
| Nicotine dependence (HSI score)§, % (n) | |||
| Low dependence | 38.9 (276) | 38.6 (139) | 39.3 (137) |
| Moderate dependence | 42.9 (304) | 43.1 (155) | 42.7 (149) |
| High dependence | 14.5 (103) | 15.3 (55) | 13.8 (48) |
| Missing | 3.7 (26) | 3.1 (11) | 4.3 (15) |
| Perceived chance of quitting§, % (n) | |||
| Very low/low/not very high | 58.7 (416) | 56.9 (205) | 60.5 (211) |
| Quite high/very high/extremely high | 38.5 (273) | 41.4 (149) | 35.5 (124) |
| Missing | 2.8 (20) | 1.7 (6) | 4.0 (14) |
| Previous quit attempts§, % (n) | |||
| None | 20.3 (144) | 21.7 (78) | 18.9 (66) |
| 1–5 | 59.7 (423) | 57.5 (207) | 61.9 (216) |
| >5 | 19.0 (135) | 20.0 (72) | 18.1 (63) |
| Missing | 1.0 (7) | 0.8 (3) | 1.1 (4) |
| Eligibility for LDCT scan, % (n) | 84.5 (845) | 84.6 (416) | 83.4 (429) |
| LDCT scan willingness (of ineligible), % (n) | |||
| Yes, definitely | 66.9 (107) | 71.8 (56) | 62.2 (51) |
| Yes, probably | 15.0 (24) | 10.3 (8) | 19.5 (16) |
| Probably not | 3.8 (6) | 1.3 (1) | 6.1 (5) |
| Definitely not | 3.8 (6) | 5.1 (4) | 2.4 (2) |
| Missing | 10.3 (17) | 11.5 (9) | 9.8 (8) |
Definition of abbreviations: LDCT = low-dose computed tomography; HSI = Heaviness of Smoking Index.
*
Never smokers (n = 4) and missing smokers (n = 1) were excluded.
†
Former smokers only (n = 269).
‡
For participants reporting grams of tobacco per week, these were converted to number of cigarettes per day.
§
Current smokers only (n = 709).