Methods Parallel, individually randomised controlled trial. Eligible participants were long-term smokers with at least 20 pack-years, aged 55 and above. The CHEST intervention entailed a consultation to discuss and implement a self-help manual, followed by self-monitoring reminders to encourage help-seeking for respiratory symptoms. The control group received a brief discussion about lung health. Both groups had baseline spirometry. Telephone randomisation was conducted, 1:1, stratified Medical Research Council (MRC) dyspnoea score and general practice. Participants could not be blinded; data extraction and statistical analyses were performed blinded to group assignment. The primary outcome was respiratory consultation rates.
Results We randomised 551 participants (274 intervention, 277 control) from whom the primary outcome was determined for 542 (269 intervention, 273 control). There was a 40% relative increase in respiratory consultations in the intervention group: (adjusted rates (95% CI) intervention 0.57 (0.47 to 0.70), control 0.41 (0.32 to 0.52), relative rate 1.40 (1.08 to 1.82); p=0.0123). There were no significant differences in time to first respiratory consultation, total consultation rates or measures of psychological harm. The incremental cost-effectiveness ratio was $A1289 per additional respiratory consultation.
Conclusions A behavioural intervention can significantly increase consulting for respiratory symptoms in patients at increased risk of lung cancer. This intervention could have an important role in primary care as part of a broader approach to improve respiratory health in patients at higher risk.
Trial registration number Australian New Zealand Clinical Trial Registry (1261300039 3752). This was registered pre-results.
This trial was funded by the National Health and Medical Research Council (NHMRC grant ID 1064121). It was supported by the Cancer Australia Primary Care Collaborative Cancer Clinical Trials Group (PC4).
JDE is supported by an NHMRC Practitioner Fellowship. FMW was supported by a Clinician Scientist award (RG 68235) from the National Institute for Health Research (NIHR).
We thank all the trial participants and general practices who were involved in this trial.
- lung cancer
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- School of Medicine, Medical Sciences & Nutrition, Applied Health Sciences - Personal Chair (Clinical)
- Institute of Applied Health Sciences
Person: Clinical Academic