The impact of lung function case-finding tests on smoking behaviour: A nested randomised trial within a case-finding cohort.

Rationale Aims And Objectives: Increasing awareness of people's lung health through the use of lung function tests or symptom-based questionnaires is a potential method to aid smoking cessation. We investigated the impact of case-finding lung function tests for chronic obstructive pulmonary disease on smoking behaviour.

Methods: Our trial used a novel waiting list randomised controlled trial design, nested within a case-finding cohort study.