{"doi":"10.1159/000542382","title":"Nail Clubbing: A Dermatologic Window into Underlying Systemic Disease – an All of Us Study","abstract":"Introduction: Nail clubbing is defined as distal phalanx thickening resulting in a bulbous appearance of the digit. We aimed to describe non-pulmonary medical conditions associated with nail clubbing using a cross-sectional approach. Methods: We conducted a cross-sectional analysis of the All of Us Research Program, identifying nail clubbing patients by ICD-10-CM and/or SNOMED code. Nail clubbing patients with pulmonary disease (cases) were compared to nail clubbing patients without pulmonary disease (controls). Fisher’s exact test/Pearson’s χ2 test analyzed categorical variables. Independent two-sample t tests analyzed continuous variables. Odds ratios (ORs) were analyzed with multivariate logistic regression adjusted for sociodemographic characteristics. Results: In total, 85 participants had nail clubbing, of which 63.53% had a pulmonary disease versus 36.47% of controls. Overall, across both cases and controls, 22% of patients had chronic liver disease, 17% hypothyroidism, 8% HIV infection, and 5% Graves’ disease/hyperthyroidism. Male versus female patients with nail clubbing had decreased odds of having concurrent respiratory disease diagnosis (OR, 0.37; 95% CI, 0.14–0.92, p = 0.03). Conclusion: Greater than one-third of patients had nail clubbing associated with a non-pulmonary systemic disease, and a significant proportion were male. Consideration of a broad differential of pathologies associated with nail clubbing is needed to initiate workup and make appropriate screening referrals.","journal":"Skin Appendage Disorders","year":2024,"id":505731,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":0,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9502,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2024-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":979996,"name":"Shari R. Lipner","orcid":"0000-0001-5913-9304","position":1,"is_corresponding":false},{"id":1356543,"name":"Noelle Desir","orcid":"0009-0003-9483-4267","position":0,"is_corresponding":true}],"reference_count":16,"raw_metadata":null,"created_at":"2026-07-19T02:10:47.170978Z","pmid":"40176990","pmcid":null,"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":[]}