Fig. 3From: Prognostic value of patient-reported outcome measures (PROMs) in adults with non-small cell Lung Cancer: a scoping reviewTypes of covariates in the prognostic factor analyses and prognostic models (each could include more than one type of covariates); covariates in ‘others’ included, e.g., survey mode of administration (e.g., paper or telephone), C-reactive protein, and forced expiratory volumeBack to article page