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Association between time-to-treatment and outcomes in non-small cell lung cancer: a systematic review

Research output: Contribution to journalArticlepeer-review

Helen Hall, Adam Tocock, Sarah Burdett, David Fisher, William M. Ricketts, John Robson, Thomas Round, Sarita Gorolay, Emma MacArthur, Donna Chung, Sam M. Janes, Michael D. Peake, Neal Navani

Original languageEnglish
Pages (from-to)762-768
Number of pages7
JournalThorax
Volume77
Issue number8
Early online date17 Aug 2021
DOIs
Accepted/In press16 Jul 2021
E-pub ahead of print17 Aug 2021
Published25 Jul 2022

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Publisher Copyright: © Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY. Published by BMJ.

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Abstract

BACKGROUND: National targets for timely diagnosis and management of a potential cancer are driven in part by the perceived risk of disease progression during avoidable delays. However, it is unclear to what extent time-to-treatment impacts prognosis for patients with non-small cell lung cancer, with previous reviews reporting mixed or apparently paradoxical associations. This systematic review focuses on potential confounders in order to identify particular patient groups which may benefit most from timely delivery of care. METHODS: Medline, EMBASE and Cochrane databases were searched for publications between January 2012 and October 2020, correlating timeliness in secondary care pathways to patient outcomes. The protocol is registered with PROSPERO (the International Prospective Register of Systematic Reviews; ID 99239). Prespecified factors (demographics, performance status, histology, stage and treatment) are examined through narrative synthesis. RESULTS: Thirty-seven articles were included. All but two were observational. Timely care was generally associated with a worse prognosis in those with advanced stage disease (6/8 studies) but with better outcomes for patients with early-stage disease treated surgically (9/12 studies). In one study, patients with squamous cell carcinoma referred for stereotactic ablative radiotherapy benefited more from timely care, compared with patients with adenocarcinoma. One randomised controlled trial supported timeliness as being advantageous in those with stage I-IIIA disease. CONCLUSION: There are limitations to the available evidence, but observed trends suggest timeliness to be of particular importance in surgical candidates. In more advanced disease, survival trends are likely outweighed by symptom burden, performance status or clinical urgency dictating timeliness of treatment.

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