|Inclusion criteria||Exclusion criteria and notes|
|Study design||Systematic reviews or meta-analyses.||
Editorials or commentaries on included reviews.|
Meta-analyses not conducted as part of a systematic review were excluded from the overview of reviews (see text below).
|Target population||Patients with a primary diagnosis of lung cancer reported separately from other cancers.||
Reviews of mixed cancers were only considered if they included > 1 lung cancer study, with findings reported separately from other cancers. Studies of prognostic or predicative factors for developing lung cancer, in an otherwise healthy population, were not included.|
Lung cancer studies not reporting on histological subtypes were excluded for the overview of reviews (see text below).
|Type of prognostic factors (exposure)||Any prognostic or predictive factors relating to the patient, tumour, socioeconomic position, or healthcare provider and system were included. Reviews of single or multiple factors were included.||The review did not include studies evaluating the effectiveness of treatments to improve survival. However, predictive factors of treatment outcomes (PROGRESS theme 4 research) were considered for inclusion in the mapping review.|
|Outcome measure||Overall or cancer specific survival.||–|
|Language and publication type||No language restrictions were used during the searches and mapping review.||Non-English language publications and conference abstracts were not included in the overview of reviews.|