The Screening , Evaluating and Assessing Rate CHanges of diagnosing respiratory conditions in primary care 1 ( SEARCH1 ) study assessed whether screening using the COPD Population Screener ( COPD-PS ) questionnaire to detect COPD risk factors and symptoms , with or without a handheld spirometer ( copd-6 ) to detect airflow limitation , can increase yields of COPD diagnosis and respiratory-related clinician actions in primary care .