Important prognostic risk factor domains and subdomains in patients with low back pain (modified from Hayden et al. [7]).

LBP: low back pain; NSLBP: nonspecific low back pain;†To fulfil this subdomain, at least one more attribute (in addition to pain duration) had to be reported (e.g. disability, severity, pain referral) [30];*SQR: Score for the quantity of reporting: Scoring SQR high: information reported in one or more subdomains for all six main domains; SQR moderate: information reported in one or more subdomains for five main domains; SQR low: information reported in one or more subdomains for four or fewer main domains.