{"id":"https://openalex.org/W7204496685","doi":"https://doi.org/10.3389/fnut.2026.1920952","title":"Serum 25-hydroxyvitamin D concentrations, well being, and presenteeism among hospital porters: a single-center cross-sectional study in Greece","display_name":"Serum 25-hydroxyvitamin D concentrations, well being, and presenteeism among hospital porters: a single-center cross-sectional study in Greece","publication_year":2026,"publication_date":"2026-08-28","ids":{"openalex":"https://openalex.org/W7204496685","doi":"https://doi.org/10.3389/fnut.2026.1920952","pmid":"https://pubmed.ncbi.nlm.nih.gov/42729136","pmcid":"https://www.ncbi.nlm.nih.gov/pmc/articles/13561885"},"language":"en","primary_location":{"id":"doi:10.3389/fnut.2026.1920952","doi":"https://doi.org/10.3389/fnut.2026.1920952","is_oa":true,"landing_page_url":"https://doi.org/10.3389/fnut.2026.1920952","pdf_url":"https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2026.1920952/pdf","source":{"id":"https://openalex.org/S2596909297","display_name":"Frontiers in Nutrition","issn_l":"2296-861X","issn":["2296-861X"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","norway-1","poland-70","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320527","host_organization_name":"Frontiers Media","host_organization_lineage":["https://openalex.org/P4310320527"],"host_organization_lineage_names":["Frontiers Media"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Frontiers in Nutrition","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","doaj","pubmed"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2026.1920952/pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5058176945","display_name":"Elena Vasileiou","orcid":"https://orcid.org/0009-0007-1183-8721","observed_orcids":["https://orcid.org/0009-0007-1183-8721"]},"institutions":[{"id":"https://openalex.org/I147962203","display_name":"Democritus University of Thrace","ror":"https://ror.org/03bfqnx40","country_code":"GR","type":"education","lineage":["https://openalex.org/I147962203"]},{"id":"https://openalex.org/I4210161335","display_name":"University Hospital of Alexandroupolis","ror":"https://ror.org/04zkctn64","country_code":"GR","type":"healthcare","lineage":["https://openalex.org/I4210161335"]}],"countries":["GR"],"is_corresponding":true,"raw_author_name":"Elena Vasileiou","raw_affiliation_strings":["Department of Occupational Medicine, University General Hospital of Alexandroupolis","Laboratory of Hygiene and Environmental Protection, Medical School, Democritus University of Thrace"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Occupational Medicine, University General Hospital of Alexandroupolis","institution_ids":["https://openalex.org/I4210161335"]},{"raw_affiliation_string":"Laboratory of Hygiene and Environmental Protection, Medical School, Democritus University of Thrace","institution_ids":["https://openalex.org/I147962203"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5071179540","display_name":"Evangelia Nena","orcid":"https://orcid.org/0000-0003-0381-4715","observed_orcids":["https://orcid.org/0000-0003-0381-4715"]},"institutions":[{"id":"https://openalex.org/I147962203","display_name":"Democritus University of Thrace","ror":"https://ror.org/03bfqnx40","country_code":"GR","type":"education","lineage":["https://openalex.org/I147962203"]},{"id":"https://openalex.org/I4210161335","display_name":"University Hospital of Alexandroupolis","ror":"https://ror.org/04zkctn64","country_code":"GR","type":"healthcare","lineage":["https://openalex.org/I4210161335"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Evangelia Nena","raw_affiliation_strings":["Department of Occupational Medicine, University General Hospital of Alexandroupolis","Laboratory of Hygiene and Environmental Protection, Medical School, Democritus University of Thrace","Laboratory of Social Medicine, Medical School, Democritus University of Thrace"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Occupational Medicine, University General Hospital of Alexandroupolis","institution_ids":["https://openalex.org/I4210161335"]},{"raw_affiliation_string":"Laboratory of Hygiene and Environmental Protection, Medical School, Democritus University of Thrace","institution_ids":["https://openalex.org/I147962203"]},{"raw_affiliation_string":"Laboratory of Social Medicine, Medical School, Democritus University of Thrace","institution_ids":["https://openalex.org/I147962203"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5000079574","display_name":"Paschalis Ntolios","orcid":"https://orcid.org/0000-0002-7875-3905","observed_orcids":["https://orcid.org/0000-0002-7875-3905"]},"institutions":[{"id":"https://openalex.org/I147962203","display_name":"Democritus University of Thrace","ror":"https://ror.org/03bfqnx40","country_code":"GR","type":"education","lineage":["https://openalex.org/I147962203"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Paschalis Ntolios","raw_affiliation_strings":["Department of Nursing, Faculty of Health Sciences, Democritus University of Thrace"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Nursing, Faculty of Health Sciences, Democritus University of Thrace","institution_ids":["https://openalex.org/I147962203"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5025124886","display_name":"Athanasios Zissimopoulos","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I147962203","display_name":"Democritus University of Thrace","ror":"https://ror.org/03bfqnx40","country_code":"GR","type":"education","lineage":["https://openalex.org/I147962203"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Athanasios Zissimopoulos","raw_affiliation_strings":["Medical School, Democritus University of Thrace"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Medical School, Democritus University of Thrace","institution_ids":["https://openalex.org/I147962203"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5029071135","display_name":"Theodoros K. Constantinides","orcid":"https://orcid.org/0000-0002-7147-6941","observed_orcids":["https://orcid.org/0000-0002-7147-6941"]},"institutions":[{"id":"https://openalex.org/I147962203","display_name":"Democritus University of Thrace","ror":"https://ror.org/03bfqnx40","country_code":"GR","type":"education","lineage":["https://openalex.org/I147962203"]},{"id":"https://openalex.org/I4210161335","display_name":"University Hospital of Alexandroupolis","ror":"https://ror.org/04zkctn64","country_code":"GR","type":"healthcare","lineage":["https://openalex.org/I4210161335"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Theodoros Constantinides","raw_affiliation_strings":["Department of Occupational Medicine, University General Hospital of Alexandroupolis","Laboratory of Hygiene and Environmental Protection, Medical School, Democritus University of Thrace"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Occupational Medicine, University General Hospital of Alexandroupolis","institution_ids":["https://openalex.org/I4210161335"]},{"raw_affiliation_string":"Laboratory of Hygiene and Environmental Protection, Medical School, Democritus University of Thrace","institution_ids":["https://openalex.org/I147962203"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5058176945"],"corresponding_institution_ids":["https://openalex.org/I147962203","https://openalex.org/I4210161335"],"apc_list":{"value":3150,"currency":"CHF","value_usd":3801},"apc_paid":{"value":3150,"currency":"CHF","value_usd":3801},"fwci":0.0,"has_fulltext":true,"cited_by_count":0,"citation_normalized_percentile":{"value":0.0,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"13","issue":null,"first_page":"1920952","last_page":"1920952"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10277","display_name":"Vitamin D Research Studies","score":0.9940999746322632,"subfield":{"id":"https://openalex.org/subfields/2712","display_name":"Endocrinology, Diabetes and Metabolism"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},"topics":[{"id":"https://openalex.org/T10277","display_name":"Vitamin D Research Studies","score":0.9940999746322632,"subfield":{"id":"https://openalex.org/subfields/2712","display_name":"Endocrinology, Diabetes and Metabolism"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11084","display_name":"Workplace Health and Well-being","score":0.0034000000450760126,"subfield":{"id":"https://openalex.org/subfields/2739","display_name":"Public Health, Environmental and Occupational Health"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T13315","display_name":"Occupational Health and Safety in Workplaces","score":0.0005000000237487257,"subfield":{"id":"https://openalex.org/subfields/2739","display_name":"Public Health, Environmental and Occupational Health"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/vitamin-d-deficiency","display_name":"vitamin D deficiency","score":0.9269999861717224},{"id":"https://openalex.org/keywords/25-hydroxyvitamin-d","display_name":"25-hydroxyvitamin D","score":0.9610000252723694},{"id":"https://openalex.org/keywords/hospital-porters","display_name":"hospital porters","score":0.9440000057220459},{"id":"https://openalex.org/keywords/presenteeism","display_name":"presenteeism","score":0.8040000200271606},{"id":"https://openalex.org/keywords/psychological-well-being","display_name":"psychological well-being","score":0.984000027179718},{"id":"https://openalex.org/keywords/body-mass-index","display_name":"body mass index","score":0.7480000257492065},{"id":"https://openalex.org/keywords/healthcare-worker-health","display_name":"healthcare worker health","score":0.6320000290870667},{"id":"https://openalex.org/keywords/occupational-health","display_name":"occupational health","score":0.6039999723434448}],"concepts":[{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.821399986743927},{"id":"https://openalex.org/C77350462","wikidata":"https://www.wikidata.org/wiki/Q1125472","display_name":"Confounding","level":2,"score":0.6730999946594238},{"id":"https://openalex.org/C2780221984","wikidata":"https://www.wikidata.org/wiki/Q131191","display_name":"Body mass index","level":2,"score":0.6582000255584717},{"id":"https://openalex.org/C2779382274","wikidata":"https://www.wikidata.org/wiki/Q1756074","display_name":"Presenteeism","level":3,"score":0.6291999816894531},{"id":"https://openalex.org/C2777895361","wikidata":"https://www.wikidata.org/wiki/Q1758614","display_name":"Longitudinal study","level":2,"score":0.4560999870300293},{"id":"https://openalex.org/C124490489","wikidata":"https://www.wikidata.org/wiki/Q7936963","display_name":"Vitamin D and neurology","level":2,"score":0.43869999051094055},{"id":"https://openalex.org/C149923435","wikidata":"https://www.wikidata.org/wiki/Q37732","display_name":"Demography","level":1,"score":0.43560001254081726},{"id":"https://openalex.org/C74909509","wikidata":"https://www.wikidata.org/wiki/Q10387","display_name":"Gerontology","level":1,"score":0.3772999942302704},{"id":"https://openalex.org/C107130276","wikidata":"https://www.wikidata.org/wiki/Q133805","display_name":"Epidemiology","level":2,"score":0.36880001425743103},{"id":"https://openalex.org/C201903717","wikidata":"https://www.wikidata.org/wiki/Q1778788","display_name":"Cohort study","level":2,"score":0.367900013923645},{"id":"https://openalex.org/C85973986","wikidata":"https://www.wikidata.org/wiki/Q1091731","display_name":"Exploratory research","level":2,"score":0.3643999993801117},{"id":"https://openalex.org/C160735492","wikidata":"https://www.wikidata.org/wiki/Q31207","display_name":"Health care","level":2,"score":0.34119999408721924},{"id":"https://openalex.org/C2778755073","wikidata":"https://www.wikidata.org/wiki/Q10858537","display_name":"Scale (ratio)","level":2,"score":0.3393000066280365},{"id":"https://openalex.org/C142052008","wikidata":"https://www.wikidata.org/wiki/Q954027","display_name":"Cross-sectional study","level":2,"score":0.33250001072883606},{"id":"https://openalex.org/C3017595490","wikidata":"https://www.wikidata.org/wiki/Q17006263","display_name":"University hospital","level":2,"score":0.32100000977516174},{"id":"https://openalex.org/C1862650","wikidata":"https://www.wikidata.org/wiki/Q186005","display_name":"Physical therapy","level":1,"score":0.3188000023365021},{"id":"https://openalex.org/C512399662","wikidata":"https://www.wikidata.org/wiki/Q3505712","display_name":"Family medicine","level":1,"score":0.31529998779296875},{"id":"https://openalex.org/C188816634","wikidata":"https://www.wikidata.org/wiki/Q2113324","display_name":"Prospective cohort study","level":2,"score":0.30000001192092896},{"id":"https://openalex.org/C134362201","wikidata":"https://www.wikidata.org/wiki/Q317309","display_name":"Mental health","level":2,"score":0.2962999939918518},{"id":"https://openalex.org/C2779740938","wikidata":"https://www.wikidata.org/wiki/Q4138762","display_name":"vitamin D deficiency","level":3,"score":0.2662000060081482},{"id":"https://openalex.org/C99454951","wikidata":"https://www.wikidata.org/wiki/Q932068","display_name":"Environmental health","level":1,"score":0.26409998536109924},{"id":"https://openalex.org/C2776644030","wikidata":"https://www.wikidata.org/wiki/Q25324519","display_name":"Hospital readmission","level":2,"score":0.2624000012874603},{"id":"https://openalex.org/C2992019943","wikidata":"https://www.wikidata.org/wiki/Q16917","display_name":"General hospital","level":2,"score":0.2590999901294708},{"id":"https://openalex.org/C2779473830","wikidata":"https://www.wikidata.org/wiki/Q1540899","display_name":"MEDLINE","level":2,"score":0.25690001249313354},{"id":"https://openalex.org/C138816342","wikidata":"https://www.wikidata.org/wiki/Q189603","display_name":"Public health","level":2,"score":0.25679999589920044},{"id":"https://openalex.org/C2780877353","wikidata":"https://www.wikidata.org/wiki/Q2518253","display_name":"Health services research","level":3,"score":0.2556999921798706},{"id":"https://openalex.org/C3019871722","wikidata":"https://www.wikidata.org/wiki/Q718944","display_name":"Hospital admission","level":2,"score":0.2556000053882599},{"id":"https://openalex.org/C156957248","wikidata":"https://www.wikidata.org/wiki/Q1862216","display_name":"Odds ratio","level":2,"score":0.2547999918460846}],"mesh":[],"locations_count":4,"locations":[{"id":"doi:10.3389/fnut.2026.1920952","doi":"https://doi.org/10.3389/fnut.2026.1920952","is_oa":true,"landing_page_url":"https://doi.org/10.3389/fnut.2026.1920952","pdf_url":"https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2026.1920952/pdf","source":{"id":"https://openalex.org/S2596909297","display_name":"Frontiers in Nutrition","issn_l":"2296-861X","issn":["2296-861X"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","norway-1","poland-70","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320527","host_organization_name":"Frontiers Media","host_organization_lineage":["https://openalex.org/P4310320527"],"host_organization_lineage_names":["Frontiers Media"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Frontiers in Nutrition","raw_type":"journal-article"},{"id":"pmh:oai:pubmedcentral.nih.gov:13561885","doi":null,"is_oa":true,"landing_page_url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC13561885/","pdf_url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC13561885/pdf/fnut-13-1920952.pdf","source":{"id":"https://openalex.org/S2764455111","display_name":"PubMed Central","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Front Nutr","raw_type":"Text"},{"id":"pmid:42729136","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/42729136","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Frontiers in nutrition","raw_type":"Journal Article"},{"id":"pmh:oai:doaj.org/article:08791e31a0fb4e9abf3a579d311bc8f7","doi":null,"is_oa":false,"landing_page_url":"https://doaj.org/article/08791e31a0fb4e9abf3a579d311bc8f7","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Frontiers in Nutrition, Vol 13 (2026)","raw_type":"article"}],"best_oa_location":{"id":"doi:10.3389/fnut.2026.1920952","doi":"https://doi.org/10.3389/fnut.2026.1920952","is_oa":true,"landing_page_url":"https://doi.org/10.3389/fnut.2026.1920952","pdf_url":"https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2026.1920952/pdf","source":{"id":"https://openalex.org/S2596909297","display_name":"Frontiers in Nutrition","issn_l":"2296-861X","issn":["2296-861X"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","norway-1","poland-70","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320527","host_organization_name":"Frontiers Media","host_organization_lineage":["https://openalex.org/P4310320527"],"host_organization_lineage_names":["Frontiers Media"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Frontiers in Nutrition","raw_type":"journal-article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/3","display_name":"Good health and well-being","score":1.0},{"id":"https://metadata.un.org/sdg/8","display_name":"Decent work and economic growth","score":0.833299994468689}],"study_designs":[{"id":"https://openalex.org/study-designs/observational-study","display_name":"Observational Study"}],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7204496685.pdf","grobid_xml":"https://content.openalex.org/works/W7204496685.grobid-xml"},"referenced_works_count":22,"referenced_works":["https://openalex.org/W1992807835","https://openalex.org/W1994953561","https://openalex.org/W2016195458","https://openalex.org/W2066690727","https://openalex.org/W2182634506","https://openalex.org/W2376179620","https://openalex.org/W2569150805","https://openalex.org/W2599076725","https://openalex.org/W2937698148","https://openalex.org/W2949941999","https://openalex.org/W3184404496","https://openalex.org/W4224063239","https://openalex.org/W4286587091","https://openalex.org/W4293003987","https://openalex.org/W4296006227","https://openalex.org/W4309337917","https://openalex.org/W4310595603","https://openalex.org/W4327744679","https://openalex.org/W4391104034","https://openalex.org/W7128167120","https://openalex.org/W7160303664","https://openalex.org/W7163128184"],"related_works":["https://openalex.org/W7163128184","https://openalex.org/W4415995313","https://openalex.org/W4396580969","https://openalex.org/W2618705523","https://openalex.org/W7124868047","https://openalex.org/W2091920516","https://openalex.org/W2186052416","https://openalex.org/W1994953561","https://openalex.org/W2293022314","https://openalex.org/W7217062626"],"abstract_inverted_index":{"Vitamin":[0],"D":[1,35],"deficiency":[2],"is":[3,26],"common":[4],"among":[5,48],"healthcare":[6],"workers":[7],"owing":[8],"to":[9],"indoor":[10],"work,":[11],"shift":[12],"patterns,":[13],"and":[14,38,46,63,92,101,150,186,196],"limited":[15],"sunlight,":[16],"even":[17],"in":[18,51,57,206],"Mediterranean":[19],"countries,":[20],"yet":[21],"evidence":[22],"for":[23,203],"hospital":[24,49,56],"porters":[25,50,161],"scarce.":[27],"This":[28],"single-center,":[29],"cross-sectional":[30],"study":[31],"assessed":[32],"serum":[33],"25-hydroxyvitamin":[34],"[25(OH)D]":[36],"concentrations":[37],"their":[39],"unadjusted":[40,134],"associations":[41,193],"with":[42,119,139,152],"psychological":[43],"well":[44],"being":[45],"presenteeism":[47],"a":[52],"Greek":[53,84],"tertiary":[54],"university":[55],"Alexandroupolis,":[58],"Northern":[59],"Greece,":[60],"between":[61],"March":[62],"June":[64],"2026.":[65],"Of":[66],"46":[67],"eligible":[68],"porters,":[69],"42":[70],"participated":[71],"(91.3%).":[72],"Serum":[73],"25(OH)D":[74,113,136,164],"was":[75,114,126,184],"measured":[76],"by":[77],"electrochemiluminescence":[78],"immunoassay":[79],"(ECLIA).":[80],"Participants":[81],"completed":[82],"validated":[83],"versions":[85],"of":[86],"the":[87,93,201],"WHO-5":[88,140],"Well":[89],"Being":[90],"Index":[91],"Stanford":[94],"Presenteeism":[95],"Scale":[96],"(SPS-6).":[97],"Demographic,":[98],"occupational,":[99],"lifestyle,":[100],"clinical":[102],"data,":[103],"including":[104],"BMI,":[105],"were":[106],"obtained":[107],"from":[108],"occupational-health":[109],"records.":[110],"The":[111],"median":[112],"18.7":[115],"ng/mL":[116],"(IQR":[117],"14.3\u201326.0),":[118],"59.5%":[120],"classified":[121],"as":[122],"deficient;":[123],"mean":[124],"BMI":[125,153,171],"26.7":[127],"\u00b1":[128],"3.7":[129],"kg/m":[130],"2":[131],".":[132],"In":[133],"analyses,":[135],"correlated":[137],"positively":[138],"(rho":[141,154],"=":[142,145,155,158,167,174],"0.371,":[143],"p":[144,157,166,173],"0.015)":[146],"but":[147,169],"not":[148],"SPS-6,":[149],"inversely":[151],"\u22120.465,":[156],"0.002).":[159],"Surgical":[160],"had":[162],"lower":[163],"(":[165,172],"0.025)":[168],"higher":[170],"0.029)":[175],"than":[176],"general":[177],"ward":[178],"porters.":[179],"Because":[180],"no":[181],"multivariable":[182],"adjustment":[183],"possible":[185],"residual":[187],"confounding":[188],"cannot":[189],"be":[190],"excluded,":[191],"these":[192],"are":[194],"exploratory":[195],"hypothesis-generating.":[197],"These":[198],"findings":[199],"highlight":[200],"need":[202],"longitudinal":[204],"research":[205],"this":[207],"understudied":[208],"workforce.":[209]},"counts_by_year":[],"updated_date":"2026-10-29T09:56:32.521200","created_date":"2026-08-28T00:00:00"}