ArticleScientific reports2019
A Comparison Study of Vitamin D Deficiency among Older Adults in China and the United States.
Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
37 citing papers in PubMed, 2 syntheses or guidelines pooled it, 73 citations in OpenAlex.
- High prevalence of vitamin D deficiency among the South Asian adults: a systematic review and meta-analysis.BMC public health · 2021Pooled it
- Impact of 25-Hydroxy Vitamin D on White Matter Hyperintensity in Elderly Patients: A Systematic Review and Meta-Analysis.Frontiers in neurology · 2021Pooled it
- Clinical and serological association of plasma 25-hydroxyvitamin D (25(OH)D) levels in lupus and the short-term effects of oral vitamin D supplementation.Arthritis research & therapy · 2023Trial
- Vitamin D and Health: Establishing Causal Relationships Through Observational Evidence and Hill's Criteria in a Biological Framework.Nutrients · 2026Review
- Age at menopause and risk of sarcopenia in postmenopausal women: evidence from the China health and retirement longitudinal study.Reproductive health · 2026Article
- Trends and prescribing patterns of antiosteoporosis medicines in Chinese patients: a real-world retrospective study.Aging clinical and experimental research · 2026Article
- Article
- Article
- Impact of Vitamin D Status and Supplementation on Brain-Derived Neurotrophic Factor and Mood-Cognitive Outcomes: A Structured Narrative Review.Nutrients · 2025Review
- Preoperative serum vitamin D deficiency is associated with increased rotator cuff fatty degeneration but is unlikely to influence post repair outcomes: a systematic review and meta-analysis of correlation coefficients.JSES reviews, reports, and techniques · 2025Review
- Associations of Serum Vitamin D with Sarcopenia in Patients with Chronic Liver Disease: A Population-Based Cross-Sectional Study.Calcified tissue international · 2025Article
- Molecular connections between inflammation and social determinants of health.Frontiers in epidemiology · 2025Review
- Serum 25(OH)D levels and mortality risk among middle-aged and elderly populations in the U.S.: A prospective cohort study.PloS one · 2025Article
- Novel combined pharmacological strategy to alleviate acute phase response following zoledronic acid treatment.Archives of osteoporosis · 2024Article
- Obstructive sleep apnea and vitamin D level: Has the dust settled?The clinical respiratory journal · 2024Review
- Prevalence of vitamin D deficiency and its association with cardiometabolic risk factors among healthcare workers in the Eastern Cape province, South Africa; cross-sectional study.Scientific reports · 2024Article
- Article
- Association between Vitamin D Deficiency and Clinical Parameters in Men and Women Aged 50 Years or Older: A Cross-Sectional Cohort Study.Nutrients · 2023Article
- Article
- Serum Vitamin D Status in Older Adults: A Cohort Study.Iranian journal of medical sciences · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Vitamin D deficiency is a common health concern worldwide. We aim to compare the prevalence of vitamin D deficiency among older adults (65+) in China and the United States (US). We used data from the 2011 wave of Chinese Longitudinal Healthy Longevity Survey (CLHLS) in China (n = 2180), and 2011-2014 National Health and Nutrition Examination Survey (NHANES) in the US (n = 2283). Serum 25-hydroxyvitamin D [25(OH)D] was measured and a level of under 30/50 nmol/L was defined as vitamin D severe deficiency/deficiency. Risk factors of vitamin D deficiency were examined by multivariate regression models. We found that the mean 25(OH)D concentration was lower in China than in the US (45.1 vs. 83.5 nmol/L), with Chinese elderly lower than American elderly for every age group. 70.3% in China and 17.4% in the US were considered as vitamin D deficiency (30.6% and 3.4% were considered as severe deficiency). Older age, females, ethnic minorities, higher household income, self-rated "very bad" health, and never drinkers, were statistically significant in predicting lower serum 25(OH)D levels in China. In the US, males, ethnic minorities, lower income, self-rated "very bad" health, physically inactive, overweight, and obese were related to lower serum 25(OH)D levels. Our findings suggest that different interventional strategies are needed to improve vitamin D deficiency and its associated negative health outcomes in China and the US.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.