Global and regional prevalence of vitamin D deficiency in population-based studies from 2000 to 2022: A pooled analysis of 7.9 million participants
What this study found
Global serum 25(OH)D <30 nmol/L prevalence: 15.7% (CrI 13.7–17.8); <50 nmol/L: 47.9% (CrI 44.9–50.9); <75 nmol/L: 76.6% (CrI 74.0–79.1). Prevalence declined slightly from 2000–2010 to 2011–2022 but remained high. Higher prevalence at higher latitudes; winter–spring prevalence 1.7× that of summer–autumn. Eastern Mediterranean region and Lower-middle-income countries show higher prevalence; females more affected. Vitamin D deficiency remains a global health challenge; reduce burden through prevention as a public health priority, including fortification, supplementation, appropriate sun…
- Study & population
- Systematic review and meta-analysis of population-based studies; participants aged 1 year or older; 81 countries; 7.9 million participants; cross-sectional and longitudinal designs; NHANES data included (2015-2016 and 2017-2018); data extracted with standardized form; analyses stratified by latitude, season, six WHO regions, World Bank income groups,…
- Key limitation
- Significant heterogeneity across included studies; variation in detection assays and sampling methods; many studies were cross-sectional; limited geographic representation for some regions; country-specific prevalence estimates are imprecise; differences in deficiency thresholds across sources.
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Open PDFOriginal abstract
Background Vitamin D deficiency causes the bone hypomineralization disorder osteomalacia in humans and is associated with many non-skeletal disorders. We aim to estimate the global and regional prevalence of vitamin D deficiency in people aged 1 year or older from 2000 to 2022. Methods We systematically searched Web of Science, PubMed (MEDLINE), Embase, Scopus, and Google databases on December 31, 2021, and updated them on August 20, 2022, without language and time restrictions. Meanwhile, we identified references of relevant system reviews and eligible articles and included the latest and unpublished data from the National Health and Nutrition Examination Survey (NHANES, 2015–2016 and 2017–2018) database. The studies investigating the prevalence of vitamin D deficiency in population-based studies were included. A standardized data extraction form was used to collect information from eligible studies. We used a random-effects meta-analysis to estimate the global and regional prevalence of vitamin D deficiency. We stratified meta-analyses by latitude, season, six WHO regions, the World Bank income groups, gender, and age groups. This study was registered with PROSPERO (CRD42021292586). Findings Out of 67,340 records searched, 308 studies with 7,947,359 participants from 81 countries were eligible for this study, 202 (7,634,261 participants), 284 (1,475,339 participants), and 165 (561,978 participants) studies for the prevalence of serum 25(OH)D <30, <50, and <75 nmol/L, respectively. We found that globally, 15.7% (95% CrI 13.7–17.8), 47.9% (95% CrI 44.9–50.9), and 76·6% (95% CrI 74.0–79.1) of participants had serum 25-hydroxyvitamin D levels less than 30, 50, and 75 nmol/l, respectively; the prevalence slightly decreased from 2000–2010 to 2011–2022, but it was still at a high level; people living in high latitude areas had a higher prevalence; the prevalence in winter-spring was 1.7 (95% CrI 1.4–2.0) times that in summer-autumn; the Eastern Mediterranean region and Lower-middle-income countries had a higher prevalence; females were vulnerable to vitamin D deficiency; gender, sampling frame, detection assays, sampling region, time of data collection, season, and other factors contributed to heterogeneity between the included studies. Interpretation Globally, vitamin D deficiency remained prevalent from 2000 to 2022. The high prevalence of vitamin D deficiency would increase the global burden of disease. Therefore, governments, policymakers, health workers, and individuals should attach importance to the high prevalence of vitamin D deficiency and take its prevention as a public health priority. Systematic review registration https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42021292586, PROSPERO CRD42021292586.