Table 2

Agreement between the phone screener questions and LHC assessments of (A) individual questions/eligibility criteria for all responders and (B) eligibility criteria across age/ethnicity subgroups

(A) All responders (n=14 714)Agreement between phone screener V2 and LHC
Categorical Level of agreement between phone screener and LHC
(%, Kappa*)
≥100 cigarettes in lifetime99.9% (K=NA)
Current vs former smoker94.4% (K=0.891, p<0.001)
Ethnic group †95.8% (K=0.849, p<0.001)
Highest level of education achieved53.4% (K=0.347, p<0.001)
Personal history of COPD87.5% (K=0.692, p<0.001)
Personal cancer history95.8% (K=0.816, p<0.001)
Family history lung cancer91.1% (K=0.693, p<0.001)
USPSTF criteria76.6% (K=0.441, p<0.001)
PLCOm2012 eligibility82.2% (K=0.346, p<0.001)
Continuous Mean difference (95% CI) between phone screener and LHC responses
BMI‡−1.16 kg/m2 (−1.21 to −1.11)
Pack-year history§2.87 pack-years (2.58 to 3.16)
(B) Agreement between phone screener V2 and LHC eligibility criteria across different age/ethnicity groups
n USPSTF criteria PLCOm2012 eligibility
Age (from GP data extraction)
 55–59 years364371.0%72.1%
 60–64 years372776.3%79.8%
 65–69 years354179.6%86.3%
 70–74 years271879.5%90.8%
 75 years +104181.2%91.2%
 Missing44
Ethnicity
 Asian134369.2%69.9%
 Black79668.8%75.9%
 Mixed35673.3%77.5%
 Other62970.7%76.6%
 White11 59078.5%84.6%
  • *Level of agreement according to K values defined10 as ‘slight’ (0–0.2), ‘fair’ (0.21–0.4), ‘moderate’ (0.41–0.6), ‘substantial’ (0.61–0.8) or ‘almost perfect’ (0.81–1).

  • †Summarised as three-category variable (Asian, black or white). n=2,013 (13.7%) declined to answer during the phone screener. Responses were mandated at the LHC.

  • ‡n=114 excluded due to implausible values (weight <30 kg or >200 kg; height <135 cm or 200 cm).

  • §n=103 excluded due to implausible values (>80 cigarettes per day or >280 grams of tobacco per week; smoking start age >smoking cessation age; smoking start or cessation age >current age; period of smoking abstinence >total smoking duration).

  • .BMI, body mass index; COPD, chronic obstructive pulmonary disease; LHC, lung health check; PLCO, prostate lung colorectal ovary; USPSTF, united states preventive services task force.