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Table 1 Participant and source population characteristics at ECLS study enrolment

From: Determinants of motivation to quit in smokers screened for the early detection of lung cancer: a qualitative study

  Interviewed (n = 31) Source population (n = 376) (screened ECLS study participants completing follow-up questionnaires who smoked at enrolment)
n (%) [missing] Median Range [missing] n (%) [missing] Median Range [missing]
Age (years)   58
51–74
[0]
  59
50–75
[0]
Gender
 Man 15 (48.4)   198 (52.7)  
 Woman 16 (51.6) [0]   178 (47.3) [0]  
UK region
 Greater Glasgow & Clyde 21 (67.7)   268 (71.3)  
 Tayside 10 (32.3)
[0]
  108 (28.7)
[0]
 
Ethnicity
 White Scottish or White British 30 (100)
[1]
  366 (98.4) [4]  
Scottish Index of Multiple Deprivation
 1 (most deprived quintile) 10 (32.3)   164 (43.7)  
 2 8 (25.8)   86 (22.9)  
 3 6 (19.4)   50 (13.3)  
 4 5 (16.1)   44 (11.7)  
 5 (least deprived quintile) 2 (6.5) [0]   31 (8.3) [1]  
At least one parent or sibling with a lung cancer diagnosis
 Yes 6 (19.6)   90 (23.9)  
 No 25 (80.7) [0]   286 (76.1) [0]  
Smoking pack year history   40
20–175
[0]
  37
2–175
[0]
Average no. cigarettes smoked a day   15
2–60
[0]
  17
0–136
[2]
Attempted to stop smoking in last 6 months
 Yes 9 (31.0)   95 (25.8)  
 No 20 (69.0)
[2]
  273 (74.2)
[8]
 
Intend to stop smoking in next 4 weeks
 Yes 10 (32.3)   90 (24.2)  
 Don’t know 10 (32.3)   100 (26.9)  
 No 11 (35.5)
[0]
  182 (48.9)
[4]
 
EarlyCDT-Lung result
 Positive 13 (41.9)   164 (43.6)a  
 Negative 18 (58.1)
[0]
  212 (56.4)
[0]
 
  1. aEarlyCDT-Lung results in source population not representative of all ECLS study participants due to higher sampling rate of positive test vs. negative test participants for questionnaire study