Physical prognostic factors predicting outcome following lumbar discectomy surgery: systematic review and narrative synthesis.
Alison B RushtonKonstantinos ZoulasAndrew PowellJ B StaalPublished in: BMC musculoskeletal disorders (2018)
An adequately powered low risk of bias prospective observational study is required to further investigate candidate physical prognostic factors owing to existing low/very-low level of evidence.