{"doi":"10.1177/87564793231176009","title":"Sonographic Reference Values for Median Nerve Cross-sectional Area: A Meta-analysis of Data From Healthy Individuals","abstract":"Objective: Establish median nerve cross-sectional area (CSA) reference values and identify patient-level factors impacting diagnostic thresholds. Materials and Methods: Studies were identified through a robust search of multiple databases, and quality assessment was conducted using a modified version of the National Institute of Health Study Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies. A meta-analysis was performed to identify normative values stratified by anatomic location. A meta-regression was conducted to examine heterogeneity effects of age, sex, and laterality. Results: The meta-analysis included 73 studies; 41 (56.2%) were high quality. The median nerve CSA [95% confidence interval, CI] was 6.46 mm 2 [6.09–6.84], 8.68 mm 2 [8.22–9.13], and 8.60 mm 2 [8.23–8.97] at the proximal forearm, the carpal tunnel inlet, and the proximal carpal tunnel, respectively. Age was positively associated with CSA at the level of proximal carpal tunnel (β = 0.03 mm 2 , P = .047). Men (9.42 mm 2 [8.06–10.78]) had statistically larger proximal tunnel CSA ( P = .03) as compared with women (7.71 mm 2 [7.01–8.42]). No difference was noted in laterality. Conclusion: A reference value for median nerve CSA in the carpal tunnel is 8.60 mm 2 . Adjustments may be required in pediatrics or older adults. The diagnostic threshold of 10.0 mm 2 for male patients should be cautiously applied as the upper limit of normative averages surpasses this threshold.","journal":"Journal of diagnostic medical sonography","year":2023,"id":351235,"datarank":0.40804108186026605,"base_score":2.302585092994046,"endowment":2.302585092994046,"self_citation_contribution":0.3453877639491069,"citation_network_contribution":0.06265331791115912,"self_endowment_contribution":0.3453877639491069,"citer_contribution":0.06265331791115912,"corpus_percentile":54.91606714628298,"corpus_rank":5829,"citation_count":9,"citer_count":9,"citers_with_citation_signal":3,"citers_with_endowment":3,"datacite_reuse_total":0,"is_dataset":true,"is_dataset_confidence":0.6344,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2023-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1095942,"name":"Sandy C. Takata","orcid":"0000-0002-3751-4705","position":1,"is_corresponding":false},{"id":1095943,"name":"Buwen Yao","orcid":"0000-0003-4971-4787","position":2,"is_corresponding":false},{"id":235536,"name":"Lynn Kysh","orcid":"0000-0003-1886-0546","position":3,"is_corresponding":false},{"id":75349,"name":"Wendy J. Mack","orcid":"0000-0002-2474-7921","position":4,"is_corresponding":false},{"id":711966,"name":"Shawn C. Roll","orcid":"0000-0002-4202-396X","position":0,"is_corresponding":true}],"reference_count":91,"raw_metadata":null,"created_at":"2026-07-19T01:12:41.740237Z","pmid":"37654772","pmcid":"PMC10468154","fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}