Association Of Vitamin Research Articles

Association of Vitamin D and magnesium levels with severity and mortality in patients with COVID-19

Association of Vitamin D and magnesium levels with severity and mortality in patients with COVID-19

The association of vitamin D with knee osteoarthritis pain: an analysis from the Osteoarthritis Initiative database

Knee osteoarthritis (KOA) is a major cause of disability in the elderly, with its pain primarily driving medical consultations. Despite numerous studies, the role of Vitamin D in managing KOA pain remains inconclusive. This study seeks to explore the association between serum Vitamin D levels and WOMAC pain scores, providing new insights into potential treatment strategies for KOA. Utilizing data from the Osteoarthritis Initiative (OAI) database, we conducted a cross-sectional analysis involving 524 participants. Serum levels of 25-hydroxyvitamin D were measured using liquid chromatography-tandem mass spectrometry. WOMAC pain scores served as the dependent variable. Multivariable linear regression models and restricted cubic splines were employed to assess the relationship between Vitamin D levels and KOA pain, with subgroup analyses stratified by sex. Higher Vitamin D levels were significantly associated with lower WOMAC pain scores in males across all models. For females, no significant associations were observed. The analysis suggests a nonlinear relationship between Vitamin D levels and KOA pain in the general cohort, which becomes non-significant after adjustment for covariates. Our findings indicate that Vitamin D is associated with reduced pain in male patients with KOA, highlighting a potential sex-specific therapeutic approach. The results warrant further investigation through longitudinal studies and randomized controlled trials to substantiate Vitamin D supplementation as a viable treatment for reducing KOA pain in males.

Association of Vitamin D and Prostate Health Status in Men: An Analytical Cross-Sectional Study

Association of Vitamin D and Prostate Health Status in Men: An Analytical Cross-Sectional Study

Association of Vitamin D with Haematological Inflammatory Indices in Patients with Back Pain.

To assess the relationship between vitamin D and haematological inflammatory indices (HII) in chronic low back pain (CLBP) patients. Descriptive study. Place and Duration of the Study: Harran University Hospital, Sanliurfa, Turkiye, between September 2023 and February 2024. A total of 100 CLBP patients were divided into three groups according to their vitamin D levels as deficiency (<20 µg/L), insufficiency (20-30 µg/L), and sufficiency (30-80 µg/L). Demographic characteristics, serum parameters, and HII were compared among the three groups. Additionally, the association between vitamin D and other parameters were investigated. The three groups were similar in terms of age (p = 0.640), gender distribution (p = 0.057), body mass index (BMI, p = 0.855), C-reactive protein (CRP, p = 0.965), leucocyte count (p = 0.979), neutrophil count (p = 0.525), lymphocyte count (p = 0.246), monocyte count (p = 0.485), platelet count (p = 0.878), and HII including neutrophil-to-lymphocyte ratio (NLR, p = 0.335), monocyte-to- lymphocyte ratio (MLR, p = 0.227), platelet-to-lymphocyte ratio (PLR) (p = 0.898), neutrophil-to-lymphocyte*platelet ratio (NLPR, p = 0.543), systemic inflammatory index (SII, p = 0.300), systemic inflammatory response index (SIRI, p = 0.187), and aggregate index of systemic inflammation (AISI, p = 0.219). No significant correlation was found between vitamin D concentration and other parameters (p >0.05). The coexistence of vitamin D deficiency and increased HII may accompany inflammatory conditions. However, no significant association was found between vitamin D level and HII in non-inflammatory CLBP. Inflammation, Low back pain, Neutrophil, Complete blood count, Vitamin D.

Association of Vitamin D with Haematological Inflammatory Indices in Patients with Back Pain.

To assess the relationship between vitamin D and haematological inflammatory indices (HII) in chronic low back pain (CLBP) patients. Descriptive study. Place and Duration of the Study: Harran University Hospital, Sanliurfa, Turkiye, between September 2023 and February 2024. A total of 100 CLBP patients were divided into three groups according to their vitamin D levels as deficiency (<20 µg/L), insufficiency (20-30 µg/L), and sufficiency (30-80 µg/L). Demographic characteristics, serum parameters, and HII were compared among the three groups. Additionally, the association between vitamin D and other parameters were investigated. The three groups were similar in terms of age (p = 0.640), gender distribution (p = 0.057), body mass index (BMI, p = 0.855), C-reactive protein (CRP, p = 0.965), leucocyte count (p = 0.979), neutrophil count (p = 0.525), lymphocyte count (p = 0.246), monocyte count (p = 0.485), platelet count (p = 0.878), and HII including neutrophil-to-lymphocyte ratio (NLR, p = 0.335), monocyte-to- lymphocyte ratio (MLR, p = 0.227), platelet-to-lymphocyte ratio (PLR) (p = 0.898), neutrophil-to-lymphocyte*platelet ratio (NLPR, p = 0.543), systemic inflammatory index (SII, p = 0.300), systemic inflammatory response index (SIRI, p = 0.187), and aggregate index of systemic inflammation (AISI, p = 0.219). No significant correlation was found between vitamin D concentration and other parameters (p >0.05). The coexistence of vitamin D deficiency and increased HII may accompany inflammatory conditions. However, no significant association was found between vitamin D level and HII in non-inflammatory CLBP. Inflammation, Low back pain, Neutrophil, Complete blood count, Vitamin D.

The association of vitamin D insufficiency with the prevalence of obesity in children: implications for serum calcium levels, alkaline phosphatase activity, and bone maturation.

Vitamin D deficiency has been identified as a potential risk factor for various adverse health outcomes. However, its specific role in metabolic regulation and skeletal development in school-aged children is not fully understood. This study aimed to explore the correlation between vitamin D deficiency and childhood obesity rates, and its impact on serum calcium, alkaline phosphatase, and bone age in children. The study analyzed clinical data from 159 school-aged children who underwent medical examinations. Participants were divided into the 25-hydroxyvitamin D3 (25(OH)D3) deficiency group and the 25(OH)D3 normal group based on their serum levels. We compared body mass index (BMI), total cholesterol (TC), triglycerides (TG), Ca, ALP, bone age, fasting blood glucose (FBG), and hemoglobin A1c (HbA1c) between the two groups. Logistic regression and Spearman correlation analyses were performed to further investigate relationships between 25(OH)D3 levels and metabolic and bone-related markers. This study showed that the 25(OH)D3 deficiency cohort exhibited significantly higher BMI, TC, TG, and ALP levels, with lower Ca levels and delayed bone age compared to the normal group. Logistic regression analysis identified Ca, ALP, and bone age as significant predictors of 25(OH)D3 deficiency. Subgroup analysis showed that in the 25(OH)D3 deficient group, children with higher BMI had elevated TC, ALP levels, and delayed bone age, while Ca levels were lower. Correlation analysis confirmed the predictive value of these markers for 25(OH)D3 deficiency. Our findings demonstrate that 25(OH)D3 deficiency is strongly associated with obesity in school-aged children and may negatively affect normal skeletal development. Regular monitoring of 25(OH)D3 levels in school-aged children is essential for ensuring proper growth and development, especially in those at risk for obesity.

Association of Vitamin D receptor gene polymorphism with susceptibility and prognosis of Systemic Lupus Erythematosus in Chinese patients

IntroductionThe etiology of systemic lupus erythematosus (SLE) is complex, involving both environmental and genetic factors. Previous research has indicated a potential link between autoimmune diseases, such as SLE, and variations in the vitamin D receptor gene (VDR). This study intended to explore the relationship between VDR SNPs, susceptibility to SLE, clinical parameters, and prognosis in the Chinese Han SLE population. MethodTotally, 461 healthy individuals and 503 patients were recuited SLE diagnoses were chosen. Data on clinical symptoms, scores from the Systemic Lupus Erythematosus Disease Activity Index (SLEDAI), and results from clinical examinations were collected. The study analyzed four variations in the VDR gene (FokI, BsmI, ApaI, TaqI) using MassARRAY® Iplex GOLD SNP genotyping. ResultsThe dominant model showed significant correlations between susceptibility to SLE and the FokI (P < 0.001) and ApaI (P < 0.001) SNPs. Additionally, mucosal ulcer was linked to FokI, while hematologic disorder, rash, photosensitivity, and anti-dsDNA positivity were associated with ApaI. Subsequent studies indicated that the FokI SNP was connected to a poorer prognosis in SLE patients. ConclusionsThis research indicates that VDR SNPs could potentially contribute to the susceptibility of SLE, as well as impacting the clinical presentation and outlook for Chinese individuals with SLE. (Protocol No. 2016-027, registered retrospectively).

Association of vitamin D with functional cure in chronic hepatitis B: Insights from a retrospective cohort study and an intervention study

Background & AimFunctional cure for chronic hepatitis B (CHB) patients can be achieved using nucleos(t)ide analogues (NAs) and pegylated interferon alpha (Peg-IFNα) combination treatment. However, the role of vitamin D in functional cure remains unclear. We aimed to investigate the association between vitamin D levels and functional cure in CHB patients. MethodsA retrospective study was conducted to detect changes in serum 25-hydroxyvitamin D (25(OH)D) levels in 526 CHB patients. Furthermore, an intervention study was conducted on 90 CHB patients with baseline vitamin D insufficiency, and 45 patients were randomly assigned to the control group receiving NAs/Peg-IFNα treatment, whereas the remaining patients were categorized into the vitamin D group (VD group) receiving NAs/Peg-IFNα treatment combined with vitamin D supplementation at 800 IU/day. ResultsA retrospective study revealed a progressive elevation in serum 25(OH)D levels throughout the duration of treatment. The cured group displayed significantly higher serum 25(OH)D levels than the uncured group (P = 0.046) at the end of treatment, and the changes in serum 25(OH)D (Δ25(OH)D) levels between the two groups were found to be significantly different (P < 0.0001). In the intervention study, the VD group tended to have an increased functional cure rate (48.0%) compared with the control group (34.3%) in the binary logistic regression equation analysis (P = 0.09). Notably, a linear mixed-effects model in the longitudinal analysis indicated a significant impact of serum 25(OH)D levels on treatment outcomes (P = 0.017). ConclusionsSerum 25(OH)D and Δ25(OH)D were both positively associated with functional cure in this retrospective study, and vitamin D supplementation may be helpful for functional cure in CHB patients. Registration number of Clinical TrialChiCTR1800020108.

Lower risk of the deterioration of muscle mass and function in oral active vitamin D users among Incident peritoneal dialysis patients: a 12-month follow-up cohort study

Data in terms of how active vitamin D supplementation affects muscle mass and function in end-stage renal disease (ESRD) patients has led to inconclusive results. The main goal of this research was to examine the association of active vitamin D supplementation and risk of the deterioration of muscle mass and function among ESRD patients on peritoneal dialysis (PD). Eligible ESRD patients on PD were prospectively included, and followed up at 3-month intervals in the tertiary care center. Based on the medications during the 12-month follow-up period, the patients were divided into two groups (vitamin D users and non-users). The deterioration of muscle mass and function was identified utilizing the criteria set by the Asian Working Group on Sarcopenia in 2019 (AWGS 2019). Primary outcome was defined as the deterioration of muscle mass and function at the end of the 12-month follow-up. The absolute diffecence and 95% confidence interval (CI) of the incidence of deterioration between vitamin D users and non-users was estimated. The association of vitamin D supplementation with risk of the deterioration of muscle mass and function during the 12-month follow-up period, was examined by employing multivariate logistic regression models. A total of 229 incident PD patients (6 of whom were lost in follow-up) were included. During the entire study period, 54.7% (122/223) of the remaining patients were considered users of oral active vitamin D. The incidence of deterioration in muscle mass and function was 30.5% (68/223) throughout the entire follow-up. In this regard, the rate was 23.0% (28/122) that received oral active vitamin D, while it was 39.6% (40/101) in the group that did not receive it, with an absolute diffecence of -16.6% (95% CI − 4.5, − 28.7) and an estimated relative risk (RR) of 0.784 (95% CI 0.651–0.943). After adjustment for potential confounding factors in logistic regression model, vitamin D users group was still associated with decreased risk of the deterioration of muscle mass and function (OR 0.330, 95% CI 0.159–0.683, P = 0.003). In secondary analysis, the relationship between oral active vitamin D and the deterioration of muscle mass and function remained consistent (≤ 0.25 µg per day vs. non-users; OR 0.300, 95% CI 0.131–0.688, P = 0.004); however, no significant relationship was identified in patients receiving a mean daily dose of > 0.25 µg compared with non-users (OR 0.389, 95% CI 0.146–1.034, P = 0.058). These results indicate that active vitamin D supplementation was significantly associated with a decreased risk of the deterioration of muscle mass and function in incident PD patients with ESRD. However, the amount and type of vitamin D used and the duration of the intervention warrant further randomized controlled trials to confirm the possibility that such medication improves sarcopenia in ESRD patients.

Association of dietary and circulating antioxidant vitamins with metabolic syndrome: an observational and Mendelian randomization study.

The objective of this study was to investigate the associations of dietary and circulating antioxidant vitamins with metabolic syndrome (MetS), and to assess causality using Mendelian randomization (MR). This study included 10,308 participants from the National Health and Nutrition Examination Survey. The associations of vitamins A, C, E and carotenoids with MetS were assessed using multivariable weighted logistic regression analysis. Subsequently, the MR approach was employed to test the causal associations, with inverse variance weighted (IVW) serving as the primary analysis. Observationally, dietary vitamin A (OR=0.852, 95%CI: 0.727-0.999), C (OR=0.802, 95%CI: 0.675-0.952), carotene (OR=0.832, 95%CI: 0.706-0.982), and β-carotene (OR=0.838, 95%CI: 0.706-0.995) in quartile 4 had lower incidents of MetS, when compared to quartile 1. Circulating vitamin C and carotene were also present inversely associated with MetS, while the vitamin A and E both increased this risk. IVW-MR confirmed the associations of dietary vitamin A (OR=0.920, 95%CI: 0.861-0.984), vitamin C (OR=0.905, 95%CI: 0.836-0.979) and carotene (OR=0.918, 95%CI: 0.865-0.974) with MetS. However, there was only circulating β-carotene (OR=0.909, 95%CI: 0.857-0.965) was found to be causally associated with MetS. Observational and MR studies have shown that adequate dietary intake of vitamin A, C and carotenoids may help to reduce the risk of MetS.

Association of Vitamin D Receptor Gene Variants with Diabetic Nephropathy: Scope for Further Exploration Using Epigenetics

Association of Vitamin D Receptor Gene Variants with Diabetic Nephropathy: Scope for Further Exploration Using Epigenetics

Association of vitamin D and dental caries in children

Association of vitamin D and dental caries in children

Vitamin D Deficiency among Blood Transfusion-Dependent Beta Thalassemia Children Admitted to Tertiary Level Pediatric Hospital in Nepal: A Descriptive Cross-Sectional Study

Introduction: Children with beta thalassemia are on regular blood transfusions, which could result in iron deposition in the liver causing decreased synthesis of Vitamin D-25OH. There are limited publications on the association of Vitamin D deficiency with blood transfusion-dependent thalassemia in the Nepalese population. This study aims to determine the prevalence of Vitamin D deficiency among blood transfusion-dependent beta-thalassemia patients.Methods: This was a descriptive cross-sectional study conducted among beta-thalassemia major patients under 15 years of age, receiving regular blood transfusion, from July 17, 2022, to July 16, 2023, after ethical approval obtained from Ethical Review Committee, Kanti Children’s Hospital (reference number 155). Data were collected using convenience sampling, and descriptive analyses were performed using Microsoft Excel and Statistical Package for Social Sciences (SPSS) 2024.Results: A total of 127 blood transfusion-dependent beta-thalassemia major patients were included in the study, of whom 82 (64.56%) were male. Among these patients, 104 (81.88%) were aged between 5 and 14 year. Almost one-third 41 (32.28%) had Vitamin D insufficiency, and a quarter, 34 (26.77%), had Vitamin D deficiency. Ten percent of the children were underweight, and a quarter were stunted.Conclusions: Children with blood transfusion dependent beta thalassemia major are at a greater risk for Vitamin D deficiency and iron overload

Association of Vitamin D and magnesium levels with severity and mortality in patients with COVID-19.

The study aimed to determine the association between serum magnesium and Vitamin D levels with the severity and mortality by coronavirus disease 19 (COVID-19) in hospitalized patients. Men and women over 18 years of age with probable COVID-19 were enrolled in a case-control study. Patients with a positive or negative test for Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) were allocated into case or control groups, respectively. Vitamin D deficiency was defined by concentrations < 20 ng/mL and hypomagnesemia by serum levels < 1.8 mg/dL. A total of 54 patients, 30 women and 24 men, were enrolled and allocated into the groups with (n = 27) and without (n = 27) COVID-19. The logistic regression analysis showed that Vitamin D deficiency (odds ratio [OR] = 6.13; 95% confidence intervals [CI]: 1.32-28.34) and insufficiency (OR = 0.12; 95% CI: 0.02-0.60) are significantly associated with hospitalization. However, Vitamin D disorders and hypomagnesemia were not associated with mortality. The results of the present study revealed that Vitamin D disturbances, but not hypomagnesemia, are associated with the severity of SARS-CoV-2.

Association of Vitamin E Intake with All-Cause Mortality Among Individuals with Rheumatoid Arthritis: A Cohort Study from the NHANES 1999-2018

Background The relationship between dietary vitamin E intake and mortality rates among rheumatoid arthritis (RA) patients remains a relatively uncharted territory in nutritional epidemiology, underscoring an important gap in research. Objectives This study is to explore the potential association between dietary vitamin E intake and all-cause mortality in the RA patient population. Methods This longitudinal cohort study analyzed 2,906 RA patients aged 20 years or older who participated in the National Health and Nutrition Examination Survey from 1999 to 2018. Comprehensive data on mortality, dietary vitamin E intake, and pertinent confounding variables were systematically collected and analyzed using Cox regression and spline curve fitting to analyze the potential association. Results Following the adjustment for confounding factors, a significant inverse relationship was identified between dietary vitamin E intake and the risk of all-cause mortality in patients with RA. The adjusted hazard ratios (HRs) for the second (Q2), third (Q3), and fourth (Q4) quartiles of vitamin E intake were 0.85, 0.60, and 0.68, respectively. Non-linear modeling indicated a threshold effect characterized by a curve that associated dietary vitamin E intake with mortality risk (p = 0.016). An intake threshold of 7.097 mg/day was identified, below which each unit increment in vitamin E intake was associated with a 11.1% decrease in all-cause mortality risk (HR = 0.889). Conversely, for intakes surpassing this threshold, no significant relationship with mortality risk was detected (HR = 1.0038). Conclusion The findings of this study indicate a beneficial relationship between elevated dietary vitamin E intake and a reduced risk of all-cause mortality in RA patients. The dose-response relationship exhibits a non-linear pattern, featuring a critical inflection point at an intake of approximately 7.097 mg/day.

Longitudinal associations between vitamin D status and biomarkers of inflammation in a pan-European cohort of children and adolescents

PurposeTo investigate longitudinal associations between the vitamin D status and inflammatory markers in children and adolescents.MethodsChildren from eight European countries from the IDEFICS/I.Family cohort with repeated measurements were included in this study. A linear mixed-effect model was used to model the association of serum 25(OH)D as independent variable and z-scores of inflammatory markers [CRP, cytokines, adipokines, combined inflammation score] as dependent variables, where one level accounts for differences between individuals and the other for changes over age within individuals.ResultsA total of 1,582 children were included in the study. In the adjusted model, 25(OH)D levels were positively associated with adiponectin (β = 0.11 [95% CI 0.07; 0.16]) and negatively with the inflammation score (β = − 0.24 [95% CI − 0.40; − 0.08]) indicating that the adiponectin z-score increased by 0.11 units and the inflammation score decreased by 0.24 units per 12.5 nmol/l increase in 25(OH)D. In children with overweight or obesity, only a positive association between 25(OH)D and IP-10 was observed while in children with normal weight adiponectin was positively and the inflammation score was negatively associated. Associations of vitamin D with adiponectin and the inflammation score were stronger in girls than in boys and a positive association with TNF-α was observed only in girls.ConclusionOur results suggest that an increase in vitamin D concentrations may help to regulate inflammatory biomarkers. However, it seems to be no benefit of a better vitamin D status in children with overweight/obesity unless their weight is managed to achieve an improved inflammatory marker status.

Association of vitamin D receptor gene polymorphisms, metabolic features and susceptibility to polycystic ovary syndrome: a preliminary study

Research questionAre the combined genotypes and haplotypes of VDR gene polymorphisms (FokI, ApaI, TaqI) associated with PCOS susceptibility and metabolic features of the disease? DesignWe performed a case-control study, including 46 women with PCOS and 48 controls. Genotypes of VDR genes were determined using the PCR-RFLP (restriction fragment length polymorphism) method. In all women, the waist circumference, parameters of lipid and glucose metabolism were evaluated. ResultsPCOS group presented higher waist circumference and visceral adiposity index (VAI) levels compared to controls. Total cholesterol, LDL-C and triglycerides had higher values in PCOS women. VDR-FokI C/C (F/F) genotype had significantly higher odds of PCOS (adjusted OR = 6.27, 95% CI: 1.53-25.65). VDR-Apal was associated with susceptibility to PCOS in the dominant model, the variant genotype (A/C-A/A) (A/a- a/a) had higher odds of PCOS than the wild genotype C/C (A/A) (adjusted OR = 3.15, 95% CI: 1.07-9.32). Haplotype analysis revealed that T-C- T (f-A-T) haplotype was statistically associated with lower odds of PCOS (adjusted OR = 0.10, 95% CI: 0.01-0.95). PCOS women with VDR-Fokl T/T (f/f) genotype had lower fasting glucose and higher VAI levels compared to C/T (Ff) or C/C (F/F) genotype. ConclusionThe present findings suggest the association between FokI and ApaI polymorphisms and PCOS susceptibility. Moreover, T/T (f/f) genotype of VDR-FokI could be a marker of decreased fasting glucose in PCOS. TaqI polymorphism did not reveal a relationship with PCOS susceptibility in our study population.

Association Between Vitamin Intake and Colorectal Cancer: Evidence from NHANES Data.

This study aims to investigate the associations between vitamins and colorectal cancer (CRC) based on a national sample of US adults. A total of 6200 samples were collected from the National Health and Nutrition Examination Survey to explore the relationship between vitamins (specifically, A, C, and D) and CRC. Logistic regression models were employed to assess the associations between dietary vitamin intake and CRC. Our findings indicate a negative association between vitamin C intake and CRC. However, the associations of vitamin A and vitamin D with CRC were not statistically significant. For vitamin C, compared to the first tertile, the odds ratios (ORs) and 95% confidence intervals (CIs) were 0.91 (0.76-0.97) for the second tertile and 0.81 (0.64-0.95) for the third tertile (P < 0.01). Conversely, for vitamin A, compared to the first tertile, the odds ratios (ORs) and 95% confidence intervals (CIs) were 1.02 (0.82-1.22) for the second tertile and 1.04 (0.75-1.25) for the third tertile (P < 0.01). For vitamin D, compared to the first tertile, the odds ratios (ORs) and 95% confidence intervals (CIs) were 0.96 (0.84-1.06) for the second tertile and 1.01 (0.83-1.15) for the third tertile (P < 0.01). Additionally, the negative association between vitamin C and CRC was more pronounced among females (0.76, 0.67-0.92), individuals aged 60 and above (0.75, 0.69-0.95), and those with a BMI > 30 (0.78, 0.67-0.93). Our findings suggest that higher vitamin C intake is associated with a reduced prevalence of CRC. However, further large-scale prospective cohort studies are warranted to validate our results.

Association of vitamin D deficiency with liver cirrhosis and hepatocellular carcinoma risk: A retrospective cohort study from the TriNetX US collaborative networks.

77 Background: Emerging evidence highlights the critical role of vitamin D in liver health, especially concerning the risk of liver cirrhosis and hepatocellular carcinoma (HCC). This investigation aims to explore the association between vitamin D deficiency and the prevalence of these liver diseases, contrasting outcomes between individuals with deficient and normal vitamin D levels. Methods: This cohort study utilized the US Collaborative Network within the TrinetX database, encompassing 63 medical institutions. It enrolled participants aged 20 years and older from 2011 to 2023. Vitamin D status was determined through serum 25-hydroxyvitamin D levels, categorizing deficiency as 20-30 ng/mL and normal levels as 30-80 ng/mL. Employing 1:1 propensity score matching, the study controlled for 32 characteristics, such as demographic information, health conditions, and medication use, to ensure equitable group comparisons. Additionally, a 1-year washout period was established. The primary aim was to assess the incidence of liver cirrhosis and HCC over a decade. Results: Analyzing data from over 1.86 million participants, the study ensured a balanced comparison across all variables. Participants had an average age of 50.6 years, with 66% identifying as white and 9% as black. Notably, vitamin D deficiency was significantly associated with an increased risk of liver cirrhosis (HR 1.16 [CI 1.11-1.21]) and HCC (HR 1.25 [CI 1.15-1.36]). Kaplan-Meier cumulative risk analysis further confirmed these elevated risks for both liver conditions in individuals with vitamin D deficiency compared to those with sufficient levels. Conclusions: This study confirms a significant association between vitamin D deficiency and a higher risk of liver cirrhosis and HCC, underscoring the importance of vitamin D in maintaining liver health. The findings support the potential of vitamin D level management as a preventive strategy against liver diseases. The implications of this research necessitate further exploration into the efficacy of vitamin D supplementation for liver disease prevention.

The Association of Vitamin B-12 Plasma Concentration with Stroke Incidence According to Sex

BackgroundPrevious studies reported that vitamin B-12 deficiency is associated with an increased risk of stroke. However, studies examining the association between excessive vitamin B-12 and stroke risk are limited. Our study aimed to investigate the relationship between excessive vitamin B-12 concentrations and risk of stroke and explore whether this association varies according to sex. MethodsUtilizing the Korean Genome Epidemiology Study (KoGES) prospective cohort data, our primary exposure variables were vitamin B-12 plasma concentration and sex. The occurrence of stroke served as the main outcome of interest. Hazard ratios (HRs) and 95% confidence intervals (CIs) were estimated using Cox regression analysis. An interaction analysis was conducted to assess the interaction effect of vitamin B-12 and sex on stroke incidence. ResultsCox proportional logistic regression analysis, adjusting for confounders, showed that excessive vitamin B-12 did not significantly alter stroke risk (HR: 1.22, 95% CI: 0.82, 1.71) and revealed no significant sex-based differences in stroke risk (HR: 0.90, 95% CI: 0.75, 1.04). However, interaction analysis indicated that excessive vitamin B-12 was linked to a significant increase in stroke risk in males (HR: 1.81, 95% CI: 1.10, 2.99) but not in females (HR: 1.04, 95% CI: 0.66, 1.60), with statistically significant interaction effect (P < 0.01). ConclusionsOur study demonstrated that although excessive vitamin B-12 alone does not significantly increase stroke risk, it increases risk in males when considering the interaction with sex.