The COPD Population Screener (COPD-PS) is a brief (5-item), self-reported and scored questionnaire that focuses on five domains known to predict airflow obstruction indicative of chronic obstructive pulmonary disease (COPD): breathlessness, productive cough, activity level, smoking history, age. The COPD-PS was developed and validated to identify people likely to have COPD in the general population. A total score >5 (out of a possible 10), indicates that breathing problems may be caused by COPD. The objective of this study was to assess the equivalence of web- versus paper-administration and obtain descriptive data in important subgroups.
A two-arm randomized study of internet versus paper was planned with ∼1,000 adults at least 35 years of age enrolled using an online panel survey organization. All participants completed a set of sociodemographic/clinical questions, the COPD-PS, the Medical Research Council (MRC) Dyspnea Scale, and a brief feasibility/acceptability survey. In order to have a large enough sample to evaluate the COPD-PS in subgroups defined by gender, smoking status and disease diagnoses, an additional ∼3,000 participants were recruited to participate in web-administration.
A total of 1,006 adults completed the randomized study (N=504 online, N=502 by mail). Forty-seven percent were male and the mean age (SD) was 55.0 years (11.4). There were more smokers in the web-administration arm (29%) compared to the paper-administration arm (20%; p = 0.001). There were no differences between the arms in mean COPD-PS scores (mean difference: 0.12; 95% CI: −0.14-+0.37; p=0.095). In the paper-administration arm, 101/502 (20.1%) exceeded the screening cut-off compared to 106/504 (21.0%) in the web arm (difference in proportions: 0.9%; 95% CI: −4.1%-+5.9%; p=0.720). Subgroup analyses on a separate cohort of 3,001 adults are presented in the Table.
The web-based administration of the COPD-PS performed in an equivalent manner to the paper-administered version and demonstrated sensitivity in identifying sub-groups expected to score higher on the screener.
Both paper and internet are acceptable methods for administration of the COPD-PS for screening in the general population.
Jennifer Beaumont, Employee Curtice, Shah: employed by Boehringer IngelheimBaker: employed by Pfizer; Other Beaumont, Victorson, Cella: Department in which employed provides consulting services to Boehringer Ingelheim.; No Product/Research Disclosure Information