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.

LBP：腰痛（low back pain）；NSLBP：非特异性腰痛（nonspecific low back pain）；
† 为满足该亚领域的数据收集要求，除疼痛持续时长外，至少需额外报告一项其他属性（如残疾程度、疼痛严重程度、疼痛牵涉范围）[30]；
* SQR：报告数量评分（Score for the quantity of reporting）：SQR高评分指6个主要领域均至少在一个亚领域中报告了相关信息；SQR中等评分指5个主要领域均至少在一个亚领域中报告了相关信息；SQR低评分指4个及以下主要领域均至少在一个亚领域中报告了相关信息。