The screened and non-screened groups in the DLCST (n=4051) regarding the five variables in the ‘Reduced’ HUNT model; sex, age, pack years, BMI, quit time and cigarettes per day (iqd: interquartile distribution). Variables in the screened and non-screened population of DLCST
| Variables | All | Screened | Non-screened | P value |
| Sex, males (%) | 54.70 | 56.03 | 54.63 | 0.3737 |
| Age median (iqd) | 57.61 (53.72–61.21) | 57.73 (53.66–61.23) | 57.45 (53.79–61.20) | 0.7836 |
| Pack years median (iqd) | 33.75 (27.00–42.00) | 34.00 (27.00–42.22) | 33.00 (26.25–42.00) | 0.2402 |
| BMI median (iqd) | 24.75 (22.65–27.27) | 24.74 (22.64–27.38) | 24.76 (22.66–27.17) | 0.7336 |
| Quit time, years median (iqd) | 0 (0–0) | 0 (0–0) | 0 (0–0) | 0.1855 |
| Cigarettes per day median (iqd) | 20 (15–20) | 20 (15–20) | 20 (15–20) | 0.4665 |
BMI, body mass index; DLCST, Danish Lung Cancer Screening Trial.