Search	Query	Total, n
1	(“back pain/classification”[MeSH] OR “Back Injuries/classification”[Mesh:NoExp] OR “spinal diseases/classification”[MeSH:noexp] OR “intervertebral disc degeneration/classification”[MeSH] OR “intervertebral disc displacement/classification”[MeSH] OR “spondylarthritis/classification”[MeSH:no-exp] OR “spondylarthropathies/classification”[MeSH:noexp] OR “spondylosis/classification”[MeSH] OR “spinal stenosis/classification”[MeSH] OR “sciatic neuropathy/classification”[MeSH] OR start back[tiab])	1295
2	((“back pain”[MESH] OR “back injuries”[MeSH:noexp] OR “spinal diseases”[MeSH:noexp] OR “intervertebral disc degeneration”[MESH] OR “intervertebral disc displacement”[MESH] OR “spondylarthritis”[MeSH:noexp] OR “osteoarthritis, spine”[MESH] OR “spondylarthropathies”[MESH:noexp] OR “spondylosis”[MESH] OR “spinal stenosis”[MESH] OR “sciatic neuropathy”[MESH] OR “lumbar vertebrae”[MESH] OR “intervertebral disc”[MESH] OR “zygapophyseal joint”[MESH]) OR ((“musculoskeletal pain”[MeSH:noexp] OR musculoskeletal pain[TIAB]) AND (back[TIAB] OR spine[TIAB] OR spinal[TIAB])) OR spinal pain*[TIAB] OR back disorder*[TIAB] OR back injur*[TIAB] OR back pain[TIAB] OR back pains[TIAB] OR backache*[TIAB] OR back ache*[TIAB] OR back strain*[TIAB] OR back sprain*[TIAB] OR failed back[TIAB] OR lumbago[TIAB] OR ((lumbar[TIAB] OR lumbosacral*[TIAB] OR lumbo sacral*[TIAB] OR lower back[TIAB]) AND (pain[tiab] OR pains[tiab] OR painful[tiab] OR stenosis[TIAB] OR stenoses[TIAB] OR radiculopathy[TIAB] OR instability[TIAB] OR instabilities[TIAB] OR strain[TIAB] OR strains[tiab])) OR lumbar dysfunction[TIAB] OR ((disc[TIAB] OR discs[TIAB] OR disk[TIAB] OR disks[TIAB]) AND (herniated[TIAB] OR herniation[TIAB] OR herniations[TIAB] OR degenerative[TIAB] OR degeneration[TIAB] OR prolapse*[TIAB])) OR coccydynia[TIAB] OR spondylarth*[TIAB] OR spondylisthesis[TIAB] OR spondylo*[TIAB] OR sciatica[TIAB] OR facet joint*[TIAB] OR zygapophyseal joint*[TIAB])	179453
3	(((accuracy*[tiab] OR “algorithms”[MeSH:noexp] OR algorithm*[tiab] OR classif*[tiab] OR clinical exam*[tiab] OR physical exam*[tiab] OR screening[-tiab] OR cluster*[tiab] OR cohort*[tiab] OR “cohort studies”[MeSH:noexp] OR subgroup*[tiab] OR subtype*[tiab] OR diagnose[tiab] OR diagnosing[-tiab] OR “models, statistical”[Mesh] OR predict*[tiab] OR prognos*[tw] OR reliab*[tiab] OR sensitivity analys*[tiab] OR “sensitivity and specificity”[MeSH] OR specificity[tiab] OR “severity of illness index”[Mesh] OR valid*[tiab] OR validation studies[pt] OR “treatment failure”[MeSH]) AND (chiropract*[tw] OR physical therap*[TW] OR physiotherap*[TW] OR “physical therapy modalities”[MeSH] OR primary care[tw] OR primary health care[tw] OR primary healthcare[tw])) OR back screen*[tiab] OR categorize[tiab] OR categorization[tiab] OR “classification”[MeSH] OR classification based[tiab] OR classification scheme*[tiab] OR classification system*[tiab] OR clinical decision*[tiab] OR clinical pathway*[tiab] OR clinical prediction*[tiab] OR “cluster analysis”[MeSH] OR cluster analys*[tiab] OR “decision making”[MeSH] OR decision rule*[tiab] OR decision support[tiab] OR “decision Support Techniques”[MeSH] OR diagnostic classification[tiab] OR “diagnostic self evaluation”[MeSH] OR disability evaluation*[tiab] OR “exercise test”[MeSH] OR exercise test*[tiab] OR movement test*[tiab] OR ICF[tiab] OR mechanical diagnosis[tiab] OR “medical history taking”[MeSH:-noexp] OR history taking[tiab] OR Mckenzie[tiab] OR “movement/classification”[Mesh] OR movement system*[tiab] OR “palpation”[MeSH:noexp] OR “physical examination”[MeSH:noexp] OR predictive model*[tiab] OR stratif*[tiab] OR sub classification*[tiab] OR subclassification*[tiab] OR sub group*[tiab] OR subgrouping*[tiab] OR targeted treatment*[tiab] OR (classif*[TIAB] AND (“disability evaluation”[MeSH] OR evidence based[tiab] OR functioning[tiab] OR gait[tiab] OR impairment*[tiab] OR mechanism*[tiab] OR motor control*[tiab] OR “movement”[MeSH] OR movement*[tiab] OR walking[tiab] OR pathoanatom*[tiab] OR psychological[tiab] OR psychosocial[tiab] OR rehabilitation[tiab] OR treatment based[tiab] OR cognitive[tiab] OR multidimensional[tiab] OR clinical[tiab])) OR (subgroup*[tiab] AND (“disability evaluation”[MeSH] OR exercise*[tiab] OR manipulation*[tiab] OR impairment*[tiab] OR “movement”[MeSH] OR movement*[tiab] OR prognos*[tiab] OR predictor*[tiab] OR rehabilitation[tiab] OR treatment based[tiab] OR cognitive[tiab] OR multidimensional[tiab] OR clinical[tiab])))	1348047
4	1 OR (2 AND 3)	15476
5	“Randomized Controlled Trials as Topic”[Mesh] OR “Meta-analysis as topic”[Mesh] OR “Randomized Controlled Trial”[pt] OR “Placebos”[Mesh] OR “Meta-Analysis”[pt] OR “Systematic Review”[pt] OR “Controlled Clinical Trial”[pt] OR “Practice Guideline” [Publication Type] OR systematic[subset] OR randomized[tiab] OR randomised[tiab] OR randomization[tiab] OR randomisation[tiab] OR placebo[tiab] OR randomly[tiab] OR “single blind”[tiab] OR “single blinded”[tiab] OR “double blind”[tiab] OR “double blinded”[tiab] OR systematic[tiab] OR systematically[tiab] OR meta-analysis[tiab] OR meta-synthesis[tiab] OR meta-analyses[tiab] OR meta-syntheses[tiab] OR “meta analysis”[tiab] OR “meta synthesis”[tiab] OR “meta analyses”[tiab] OR “meta syntheses”[tiab] OR metaanalysis[tiab] OR metaanalyses[tiab] OR meta-analytic[tiab] OR “meta analytic”[tiab] OR metaanalytic[tiab] OR “umbrella review”[tiab] OR “umbrella reviews”[tiab] OR “scoping review”[tiab] OR “scoping reviews”[tiab] OR “rapid review”[tiab] OR “rapid reviews”[tiab] OR “practice guideline”[tiab] OR “clinical guideline”[tiab] OR ((review[tiab] OR reviews[tiab] OR reviewed[tiab] OR search[tiab] OR searches[tiab] OR searched[tiab] OR searching[tiab] OR handsearch[tiab] OR handsearched[tiab]) AND (“inclusion criteri*”[tiab] OR “exclusion criteri*”[tiab] OR references[tiab] OR papers[tiab] OR articles[tiab] OR publications[tiab] OR studies[tiab] OR trials[tiab] OR datasets[tiab] OR databases[tiab]))	2236737
6	4 AND 5	3924