{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T17:02:01Z","timestamp":1753894921663,"version":"3.41.2"},"reference-count":37,"publisher":"Mattioli1885","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>Introduction: Seborrheic keratoses (SK) are benign epidermal tumors with high sun exposure as a major risk factor. Vitamin D deficiency is also thought to play a role in its pathogenesis. There has been no data regarding SK, calcidiol level, vitamin D intake, and sun index (SI) among people living in coastal areas in Indonesia. Objective: To assess the correlation between 1) serum calcidiol levels with SI and vitamin D intake and 2) lesion size with SI and serum calcidiol level among SK patients living in a coastal area. Methods: This is a cross-sectional study. We performed interviews using the sun index questionnaire and semiquantitative food frequency questionnaire for vitamin D; physical examination; dermoscopy to determine the largest SK lesion size; and measurement of serum calcidiol levels in participants with SK living in Cilincing District, North Jakarta. Spearman correlation test was used to assess the relationship between variables. Results: Thirty-nine participants with SK aged 19\u201359 years old were analyzed. The median of the SK\u2019s largest diameter, sun index, serum calcidiol, and vitamin D intake was 2 (1\u201310) mm, 3.95 (1.1\u201323.52), 14.3 (5.25\u201335.30) ng\/ml, and 4.3 (0.1\u201330.1) mcg\/day, respectively. Sun index and vitamin D intake were not significantly correlated with calcidiol levels. Similarly, SI and calcidiol levels were not significantly correlated with the largest SK lesion size. Conclusion: We found low calcidiol levels and vitamin D intake in this coastal population. The SI and vitamin D intake had no correlations with calcidiol levels. Furthermore, calcidiol levels and SI had no correlations with the lesion\u2019s largest diameter.<\/jats:p>","DOI":"10.5826\/dpc.1402a37","type":"journal-article","created":{"date-parts":[[2024,6,17]],"date-time":"2024-06-17T07:41:36Z","timestamp":1718610096000},"page":"e2024037","source":"Crossref","is-referenced-by-count":0,"title":["Correlation Among Serum Calcidiol, Sun Index, and Vitamin D Intake in Individuals With Seborrheic Keratoses Living in Coastal Area"],"prefix":"10.5826","volume":"14","author":[{"given":"Izzah","family":"Aulia","sequence":"first","affiliation":[{"name":"Dermatology and Venereology Department, Faculty of Medicine, Universitas Indonesia \u2013 dr. Cipto Mangunkusumo National General Hospital, Jakarta, Indonesia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Larisa Paramitha","family":"Wibawa","sequence":"additional","affiliation":[{"name":"Dermatology and Venereology Department, Faculty of Medicine, Universitas Indonesia \u2013 dr. Cipto Mangunkusumo National General Hospital, Jakarta, Indonesia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lis Surachmiati","family":"Suseno","sequence":"additional","affiliation":[{"name":"Dermatology and Venereology Department, Faculty of Medicine, Universitas Indonesia \u2013 dr. Cipto Mangunkusumo National General Hospital, Jakarta, Indonesia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nurul Ratna Mutu","family":"Manikam","sequence":"additional","affiliation":[{"name":"Departement of Nutrition, Faculty of Medicine, Universitas Indonesia \u2013 dr. Cipto Mangunkusumo National General Hospital, Jakarta, Indonesia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"27750","published-online":{"date-parts":[[2024,4,30]]},"reference":[{"key":"10.5826\/dpc.1402a37_ref1","unstructured":"Del Rosso JQ. A closer look at seborrheic keratoses: Patient perspectives, clinical relevance, medical necessity, and implications for management. J Clin Aesthet Dermatol. 2017;10(3):16-25."},{"key":"10.5826\/dpc.1402a37_ref2","unstructured":"Cuda JD, Rangwala S, Taube JM. Benign epithelial tumors, hamartomas, and hyperplasias. In: Kang S, Amagai M, Bruckner AL, editors. Fitzpatricks\u2019s dermatology. 9th Edition ed. New York: McGraw-Hill; 2019."},{"key":"10.5826\/dpc.1402a37_ref3","doi-asserted-by":"crossref","unstructured":"Mostafa WZ, Hegazy RA. Vitamin d and the skin: Focus on a complex relationship: A review. 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