(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 lifetime | 99.9% (K=NA) | ||
Current vs former smoker | 94.4% (K=0.891, p<0.001) | ||
Ethnic group † | 95.8% (K=0.849, p<0.001) | ||
Highest level of education achieved | 53.4% (K=0.347, p<0.001) | ||
Personal history of COPD | 87.5% (K=0.692, p<0.001) | ||
Personal cancer history | 95.8% (K=0.816, p<0.001) | ||
Family history lung cancer | 91.1% (K=0.693, p<0.001) | ||
USPSTF criteria | 76.6% (K=0.441, p<0.001) | ||
PLCOm2012 eligibility | 82.2% (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 years | 3643 | 71.0% | 72.1% |
60–64 years | 3727 | 76.3% | 79.8% |
65–69 years | 3541 | 79.6% | 86.3% |
70–74 years | 2718 | 79.5% | 90.8% |
75 years + | 1041 | 81.2% | 91.2% |
Missing | 44 | ||
Ethnicity | |||
Asian | 1343 | 69.2% | 69.9% |
Black | 796 | 68.8% | 75.9% |
Mixed | 356 | 73.3% | 77.5% |
Other | 629 | 70.7% | 76.6% |
White | 11 590 | 78.5% | 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.