scholarly journals Status and influential factors of vitamin D among children aged 0 to 6 years in a Chinese population

2020 ◽  
Author(s):  
Heng Zhang ◽  
Zhijuan Li ◽  
Yarong Wei ◽  
Jinyan Fu ◽  
Yaling Feng ◽  
...  
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Air Temperature ◽  
Chinese Population ◽  
Pediatric Population ◽  
Influential Factors ◽  
Enzyme Linked Immunosorbent Assay ◽  
Vitamin D Status ◽  
Group 3 ◽  
Wuxi City

Abstract Background：Vitamin D insufficiency and deficiency in childhood are common, and they are closely related to bone development. However, the status and influential factors of vitamin D during different ages are not clear. This study aimed to survey vitamin D status in children aged 0 to 6 years and explore its influential factors. Materials and methods: A total of 6953 children were recruited in Wuxi City of East China from January to December 2016. Enzyme-linked immunosorbent assay was used to determine the serum concentrations of 25-hydroxyvitamin D [25(OH)D]. Results: The median vitamin D level in the infancy group (0-1 years of age) was 69.40 nmol/L, which was higher than that in both the toddlerhood group (1-3 years of age; 62.30 nmol/L) and the preschool group (3-6 years of age; 50.85 nmol/L) (P < 0.001). In addition, the median vitamin D level was 71.70 nmol/L in summer, which was higher than that in spring (64.25 nmol/L), autumn (62.95 nmol/L) and winter (64.10 nmol/L; P < 0.001). However, no difference was observed between genders (P = 0.974). Furthermore, the prevalence of vitamin D deficiency (<50 nmol/L) was 48.1% in the preschool group (3-6 years of age), which was higher than the 21.2% vitamin D deficiency in the toddlerhood group (2-3 years of age) and the 17.9% vitamin D deficiency in the infancy group (0-1 years of age). Interestingly, a nonlinear association between 25(OH)D and air temperature was observed. Conclusions: A high prevalence of vitamin D deficiency was common in a Chinese population of children 0-6 years old, especially in the preschool-aged group. Season and air temperature were related to vitamin D status. Therefore, we suggest that the recommendation for vitamin D supplementation in the Chinese pediatric population should be revised to include older children and adolescents.

scholarly journals Status and influential factors of vitamin D among children aged 0 to 6 years in a Chinese population

2020 ◽  
Author(s):  
Heng Zhang ◽  
Zhijuan Li ◽  
Yarong Wei ◽  
Jinyan Fu ◽  
Yaling Feng ◽  
...  
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Air Temperature ◽  
Chinese Population ◽  
Influential Factors ◽  
Enzyme Linked Immunosorbent Assay ◽  
Vitamin D Status ◽  
Group 3 ◽  
Wuxi City ◽  
Group 1

Abstract Background：Vitamin D insufficiency and deficiency in childhood are common, which is closely related to bone development. However, the status and influential factors of vitamin D during different ages are not clear. This study aimed to survey vitamin D status in children aged 0 to 6 years and explore its influential factors. Materials and methods: A total of 6953 children were recruited in Wuxi City of East China from January to December in 2016. Enzyme-linked immunosorbent assay was used to determine the serum concentrations of 25-hydroxyvitamin D [25(OH)D]. Results: The median vitamin D level in the infant group (0-1 years of age) was 69.40 nmol/L, which was higher than that in both the toddlerhood group (1-3 years of age; 62.30 nmol/L) and the preschool group (3-6 years of age; 50.85 nmol/L) (P < 0.001). In addition, the median vitamin D level was 71.70 nmol/L in summer, which was higher than that in spring (64.25 nmol/L), autumn (62.95 nmol/L) and winter (64.10 nmol/L; P < 0.001). However, no difference was observed between genders (P = 0.974). Furthermore, the prevalence of vitamin D deficiency (<50 nmol/L) was 48.1% in the preschool group (3-6 years of age), which was higher than the 21.2% vitamin D deficiency in the toddlerhood group (1-3 years of age) and the 17.9% vitamin D deficiency in the infant group (0-1 years of age). Interestingly, a nonlinear association between 25(OH)D and air temperature was observed. Conclusions: A high prevalence of vitamin D deficiency was common in a Chinese population of children 0-6 years old, especially in the preschool-aged children. Season and air temperature were related to vitamin D status. Therefore, we suggest that the recommendation for vitamin D supplementation in the Chinese pediatric population should be revised to include preschoolers and adolescents. Keywords: Vitamin D; deficiency; preschool; season; air temperature.

scholarly journals Status and influential factors of vitamin D among children aged 0 to 6 years in a Chinese population

2020 ◽  
Author(s):  
Heng Zhang ◽  
Zhijuan Li ◽  
Yarong Wei ◽  
Jinyan Fu ◽  
Yaling Feng ◽  
...  
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Chinese Population ◽  
Vitamin D Insufficiency ◽  
Vitamin D Supplementation ◽  
Influential Factors ◽  
Enzyme Linked Immunosorbent Assay ◽  
Group 3 ◽  
Wuxi City ◽  
Group 1

Abstract Background : Vitamin D insufficiency and deficiency in childhood are common. However, the status and influential factors of vitamin D during different ages are not clear. This study aimed to survey vitamin D concentrations in children aged 0 to 6 years and explore its influential factors. Methods: A total of 6953 children were recruited in Wuxi City of East China from January to December in 2016. Enzyme-linked immunosorbent assay was used to determine the serum concentrations of 25-hydroxyvitamin D [25(OH)D]. Results: The median vitamin D concentrations in the infant group (0-1 years of age) was 69.40 nmol/L, which were higher than that in both the toddlerhood group (1-3 years of age; 62.30 nmol/L) and the preschool group (3-6 years of age; 50.85 nmol/L). In addition, the median vitamin D concentrations were 71.70 nmol/L in summer, which was higher than that in spring (64.25 nmol/L), autumn (62.95 nmol/L) and winter (64.10 nmol/L). However, no difference was observed between genders ( P = 0.974). Furthermore, the prevalence of vitamin D deficiency (<50 nmol/L) was 48.1% in the preschool group (3-6 years of age), which was higher than the 21.2% vitamin D deficiency in the toddlerhood group (1-3 years of age) and the 17.9% vitamin D deficiency in the infant group (0-1 years of age). Interestingly, a nonlinear association between 25(OH)D and air temperature was observed. Conclusions: A high prevalence of vitamin D deficiency was common in a Chinese population of children 0-6 years old, especially in the preschool-aged children. Therefore, we suggested that we should pay more attention to vitamin D supplementation in Chinese young children.

scholarly journals Effect of Vitamin D supplementation and outdoor activity on serum 25-Hydroxyvitamin D among children in North China: an observational study

2020 ◽  
Author(s):  
Xuguang Zhang ◽  
Yanping Chen ◽  
Shanshan Jin ◽  
Xinxin Bi ◽  
Dongkai Chen ◽  
...  
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Lower Risk ◽  
North China ◽  
Pediatric Population ◽  
Hypovitaminosis D ◽  
Vitamin D Supplementation ◽  
High Latitudes ◽  
Vitamin D Status ◽  
Outdoor Activity

Abstract Background Living at high latitudes is one of the risk factors for vitamin D deficiency in children. However, evidence on vitamin D improvement for this pediatric population to date is limited. This study aims at evaluating the effect of different supplementation methods and outdoor activity time on the vitamin D status of children in North China. Methods A total of 55,925 children aged 1 month to 18 years old were recruited from pediatric outpatient departments from July 2016 to June 2017. Data on demographics, anthropometric measurements, vitamin D supplementation, and outdoor time were recorded. The serum levels of 25-hydroxycholecalciferol (25(OH)D) were determined by high performance liquid chromatography tandem–mass spectrometry. Logistic regression analysis was performed to assess the association of vitamin D supplementation or outdoor time with blood vitamin D status, adjusted for age, gender, BMI for age, and seasons. Results The overall rate of hypovitaminosis D was 65.60%. Of the children’s outdoor time, 35.63%, 31.95%, and 32.42% were below 30 min/d, 30–60 min/d and over 60 min/d, respectively. Furthermore, the proportion of iatrogenic supplementation, voluntary supplementation and no vitamin D supplementation among the children was 16.48%, 32.87%, and 50.65%, respectively. After adjusted for confounding factors, vitamin D supplementation was associated with a lower risk of hypovitaminosis D, with OR (95% CI) of 0.191 (0.180, 0.202) in children with iatrogenic supplementation and 0.423 (0.404, 0.443) in those with voluntary supplementation, compared with children without vitamin D supplementation. In addition, longer outdoor time was associated with a lower risk of hypovitaminosis D [0.479 (0.456, 0.504) for 60 min/d, 0.737 (0.701, 0.776) for 30–60 min/d], independent of vitamin D supplementation. Conclusions High prevalence of vitamin D deficiency was found in children living at high latitudes. Vitamin D supplementation and outdoor time are all negatively associated with children’s vitamin D deficiency. Routine 25(OH)D testing combined with vitamin D supplementation might be an effective approach to prevent hypovitaminosis D among children living at high latitudes.

scholarly journals Association of serum 25-Hydroxyvitamin D with Vitamin D Intervention and outdoor activity among children in North China: an observational study

2020 ◽  
Author(s):  
Xuguang Zhang ◽  
Yanping Chen ◽  
Shanshan Jin ◽  
Xinxin Bi ◽  
Dongkai Chen ◽  
...  
Keyword(s):  
Vitamin D ◽  
Observational Study ◽  
Vitamin D Deficiency ◽  
Lower Risk ◽  
North China ◽  
Pediatric Population ◽  
Hypovitaminosis D ◽  
High Latitudes ◽  
Vitamin D Status ◽  
Outdoor Activity

Abstract Background: Living at high latitudes is one of the risk factors for vitamin D deficiency in children. However, evidence on vitamin D improvement for this pediatric population to date is limited. This study aims at evaluating the association of different vitamin D intervention methods and outdoor activity on the vitamin D status of children in North China. Methods: In this observational study, a total of 55,925 children aged 1 month to 18 years old were recruited from pediatric outpatient departments from July 2016 to June 2017. Data on demographics, anthropometric measurements, vitamin D intervention (either prescribed by physicians or given by parents) and outdoor activity were recorded. The serum levels of 25-hydroxycholecalciferol (25(OH)D) were determined by high performance liquid chromatography tandem–mass spectrometry. Logistic regression analysis was performed to assess the association of vitamin D intervention or outdoor activity with blood vitamin D status, adjusted for age, gender, BMI for age, and seasons.Results: The overall rate of hypovitaminosis D was 65.60%. Of the children’s outdoor activity, 35.63%, 31.95%, and 32.42% were below 30min/d, 30-60 min/d and over 60min/d, respectively. Furthermore, the proportion of therapeutic intervention, supplementation intervention and no vitamin D intervention among the children was 16.48%, 32.87%, and 50.65%, respectively. After adjusted for confounding factors, vitamin D intervention was associated with a lower risk of hypovitaminosis D, with OR (95% CI) of 0.191 (0.180, 0.202) in children with therapeutic doses and 0.423 (0.404, 0.443) in those with supplementation doses, compared with children without vitamin D intervention. In addition, longer outdoor time was associated with a lower risk of hypovitaminosis D [0.479 (0.456, 0.504) for 60 min/d, 0.737 (0.701, 0.776) for 30–60 min/d], independent of vitamin D intervention. Conclusions: High prevalence of vitamin D deficiency was found in children living at high latitudes. Vitamin D intervention and outdoor activity are all negatively associated with children’s vitamin D deficiency. Routine vitamin D intervention combined with increased outdoor time might be an effective approach to prevent hypovitaminosis D among children, especially those at school, living at high latitudes.

scholarly journals Association of Vitamin D Intervention and outdoor activity on serum 25-Hydroxyvitamin D among children in North China: an observational study

2020 ◽  
Author(s):  
Xuguang Zhang ◽  
Yanping Chen ◽  
Shanshan Jin ◽  
Xinxin Bi ◽  
Dongkai Chen ◽  
...  
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Lower Risk ◽  
High Performance ◽  
North China ◽  
Pediatric Population ◽  
Hypovitaminosis D ◽  
High Latitudes ◽  
Vitamin D Status ◽  
Outdoor Activity

Abstract Background: Living at high latitudes is one of the risk factors for vitamin D deficiency in children. However, evidence on vitamin D improvement for this pediatric population to date is limited. This study aims at evaluating the association of different vitamin D intervention methods and outdoor activity on the vitamin D status of children in North China. Methods: A total of 55,925 children aged 1 month to 18 years old were recruited from pediatric outpatient departments from July 2016 to June 2017. Data on demographics, anthropometric measurements, vitamin D intervention, and outdoor activity were recorded. The serum levels of 25-hydroxycholecalciferol (25(OH)D) were determined by high performance liquid chromatography tandem–mass spectrometry. Logistic regression analysis was performed to assess the association of vitamin D intervention or outdoor activity with blood vitamin D status, adjusted for age, gender, BMI for age, and seasons.Results: The overall rate of hypovitaminosis D was 65.60%. Of the children’s outdoor activity, 35.63%, 31.95%, and 32.42% were below 30min/d, 30-60 min/d and over 60min/d, respectively. Furthermore, the proportion of therapeutic intervention, supplementation intervention and no vitamin D intervention among the children was 16.48%, 32.87%, and 50.65%, respectively. After adjusted for confounding factors, vitamin D intervention was associated with a lower risk of hypovitaminosis D, with OR (95% CI) of 0.191 (0.180, 0.202) in children with therapeutic doses and 0.423 (0.404, 0.443) in those with supplementation doses, compared with children without vitamin D intervention. In addition, longer outdoor time was associated with a lower risk of hypovitaminosis D [0.479 (0.456, 0.504) for 60 min/d, 0.737 (0.701, 0.776) for 30–60 min/d], independent of vitamin D intervention. Conclusions: High prevalence of vitamin D deficiency was found in children living at high latitudes. Vitamin D intervention and outdoor activity are all negatively associated with children’s vitamin D deficiency. Routine vitamin D intervention combined with increased outdoor time might be an effective approach to prevent hypovitaminosis D among children, especially those at school, living at high latitudes.

scholarly journals Effect of Vitamin D Intervention and outdoor activity on serum 25-Hydroxyvitamin D among children in North China: an observational study

2020 ◽  
Author(s):  
Xuguang Zhang ◽  
Yanping Chen ◽  
Shanshan Jin ◽  
Xinxin Bi ◽  
Dongkai Chen ◽  
...  
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Lower Risk ◽  
High Performance ◽  
North China ◽  
Pediatric Population ◽  
Hypovitaminosis D ◽  
High Latitudes ◽  
Vitamin D Status ◽  
Outdoor Activity

Abstract Background: Living at high latitudes is one of the risk factors for vitamin D deficiency in children. However, evidence on vitamin D improvement for this pediatric population to date is limited. This study aims at evaluating the effect of different vitamin D intervention methods and outdoor activity on the vitamin D status of children in North China. Methods: A total of 55,925 children aged 1 month to 18 years old were recruited from pediatric outpatient departments from July 2016 to June 2017. Data on demographics, anthropometric measurements, vitamin D intervention, and outdoor activity were recorded. The serum levels of 25-hydroxycholecalciferol (25(OH)D) were determined by high performance liquid chromatography tandem–mass spectrometry. Logistic regression analysis was performed to assess the association of vitamin D intervention or outdoor activity with blood vitamin D status, adjusted for age, gender, BMI for age, and seasons.Results: The overall rate of hypovitaminosis D was 65.60%. Of the children’s outdoor activity, 35.63%, 31.95%, and 32.42% were below 30min/d, 30-60 min/d and over 60min/d, respectively. Furthermore, the proportion of therapeutic intervention, supplementation intervention and no vitamin D intervention among the children was 16.48%, 32.87%, and 50.65%, respectively. After adjusted for confounding factors, vitamin D intervention was associated with a lower risk of hypovitaminosis D, with OR (95% CI) of 0.191 (0.180, 0.202) in children with therapeutic doses and 0.423 (0.404, 0.443) in those with supplementation doses, compared with children without vitamin D intervention. In addition, longer outdoor time was associated with a lower risk of hypovitaminosis D [0.479 (0.456, 0.504) for 60 min/d, 0.737 (0.701, 0.776) for 30–60 min/d], independent of vitamin D intervention. Conclusions: High prevalence of vitamin D deficiency was found in children living at high latitudes. Vitamin D intervention and outdoor activity are all negatively associated with children’s vitamin D deficiency. Routine vitamin D intervention combined with increased outdoor time might be an effective approach to prevent hypovitaminosis D among children, especially those at school, living at high latitudes.

Association of Serum Vitamin D with Serum Cytokine Profile in Patients with Knee Osteoarthritis

Cartilage ◽  
2021 ◽  
pp. 194760352110103
Author(s):  
Azade Amini Kadijani ◽  
Abolfazl Bagherifard ◽  
Fatemeh Mohammadi ◽  
Abolfazl Akbari ◽  
Farshad Zandrahimi ◽  
...  
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Serum Vitamin ◽  
Cytokine Profile ◽  
Enzyme Linked Immunosorbent Assay ◽  
Vitamin D Status ◽  
Serum Cytokine ◽  
Cross Sectional ◽  
Serum Vitamin D ◽  
Knee Oa

Objective The role of vitamin D in the pathogenesis of osteoarthritis (OA) is not well understood. In this study, we aimed to investigate the association of serum vitamin D with the serum cytokine profile in patients with primary knee OA. Design In a cross-sectional study, 116 patients with radiologic diagnosis of grade I to III knee OA were included. The study population included 79 (75.9%) females and 25 (24.1%) males with a mean age of 55.1 ± 9.6 years. The serum concentration of IL-6, IL-8, TNF-α, IL-4, IL-10, IL-13, and vitamin D were assessed using an enzyme-linked immunosorbent assay. The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) was used for the assessment of patient’s reported disability associated with knee OA. Results Serum vitamin D status was deficient, insufficient, and sufficient in 18 (15.5%), 63 (54.3%), 35 (30.2%) patients, respectively. Higher levels of serum IL-6 were observed in patients with vitamin D deficiency ( P = 0.022). The mean serum vitamin D level was not associated with OA grade ( P = 0.88) and WOMAC scores of the patients ( P = 0.67). Serum IL-6 level was significantly associated with both OA grade and WOMAC scores of the patients ( P < 0.001 and P = 0.001, respectively). The vitamin D status was not significantly associated with the serum levels of other evaluated cytokines. Conclusion Vitamin D deficiency in knee OA seems to be associated with a higher release of IL-6. Therefore, vitamin D supplementation could reduce the disease burden by controlling the IL-6 release.

scholarly journals Association of serum 25-Hydroxyvitamin D with Vitamin D intervention and outdoor activity among children in North China: an observational study

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Xuguang Zhang ◽  
Yanping Chen ◽  
Shanshan Jin ◽  
Xinxin Bi ◽  
Dongkai Chen ◽  
...  
Keyword(s):  
Vitamin D ◽  
Observational Study ◽  
Vitamin D Deficiency ◽  
Lower Risk ◽  
North China ◽  
Pediatric Population ◽  
Hypovitaminosis D ◽  
High Latitudes ◽  
Vitamin D Status ◽  
Outdoor Activity

Abstract Background Living at high latitudes is one of the risk factors for vitamin D deficiency in children. However, evidence on vitamin D improvement for this pediatric population to date is limited. This study aims at evaluating the association of different vitamin D intervention methods and outdoor activity on the vitamin D status of children in North China. Methods In this observational study, a total of 55,925 children aged 1 month to 18 years old were recruited from pediatric outpatient departments from July 2016 to June 2017. Data on demographics, anthropometric measurements, vitamin D intervention (either prescribed by physicians or given by parents) and outdoor activity were recorded. The serum levels of 25-hydroxycholecalciferol (25(OH)D) were determined by high performance liquid chromatography tandem–mass spectrometry. Logistic regression analysis was performed to assess the association of vitamin D intervention or outdoor activity with blood vitamin D status, adjusted for age, gender, BMI for age, and seasons. Results The overall rate of hypovitaminosis D was 65.60%. Of the children’s outdoor activity, 35.63, 31.95, and 32.42% were below 30 min/d, 30–60 min/d and over 60 min/d, respectively. Furthermore, the proportion of therapeutic intervention, supplementation intervention and no vitamin D intervention among the children was 16.48, 32.87, and 50.65%, respectively. After adjusted for confounding factors, vitamin D intervention was associated with a lower risk of hypovitaminosis D, with OR (95% CI) of 0.191 (0.180, 0.202) in children with therapeutic doses and 0.423 (0.404, 0.443) in those with supplementation doses, compared with children without vitamin D intervention. In addition, longer outdoor time was associated with a lower risk of hypovitaminosis D [0.479 (0.456, 0.504) for 60 min/d, 0.737 (0.701, 0.776) for 30–60 min/d], independent of vitamin D intervention. Conclusions High prevalence of vitamin D deficiency was found in children living at high latitudes. Vitamin D intervention and outdoor activity are all negatively associated with children’s vitamin D deficiency. Routine vitamin D intervention combined with increased outdoor time might be an effective approach to prevent hypovitaminosis D among children, especially those at school, living at high latitudes.

scholarly journals Association of Vitamin D Intervention and outdoor activity on serum 25-Hydroxyvitamin D among children in North China: an observational study

2020 ◽  
Author(s):  
Xuguang Zhang ◽  
Yanping Chen ◽  
Shanshan Jin ◽  
Xinxin Bi ◽  
Dongkai Chen ◽  
...  
Keyword(s):  
Vitamin D ◽  
Observational Study ◽  
Vitamin D Deficiency ◽  
Lower Risk ◽  
North China ◽  
Pediatric Population ◽  
Hypovitaminosis D ◽  
High Latitudes ◽  
Vitamin D Status ◽  
Outdoor Activity

Abstract Background: Living at high latitudes is one of the risk factors for vitamin D deficiency in children. However, evidence on vitamin D improvement for this pediatric population to date is limited. This study aims at evaluating the association of different vitamin D intervention methods and outdoor activity on the vitamin D status of children in North China. Methods: In this observational study, a total of 55,925 children aged 1 month to 18 years old were recruited from pediatric outpatient departments from July 2016 to June 2017. Data on demographics, anthropometric measurements, vitamin D intervention (either prescribed by physicians or given by parents) and outdoor activity were recorded. The serum levels of 25-hydroxycholecalciferol (25(OH)D) were determined by high performance liquid chromatography tandem–mass spectrometry. Logistic regression analysis was performed to assess the association of vitamin D intervention or outdoor activity with blood vitamin D status, adjusted for age, gender, BMI for age, and seasons.Results: The overall rate of hypovitaminosis D was 65.60%. Of the children’s outdoor activity, 35.63%, 31.95%, and 32.42% were below 30min/d, 30-60 min/d and over 60min/d, respectively. Furthermore, the proportion of therapeutic intervention, supplementation intervention and no vitamin D intervention among the children was 16.48%, 32.87%, and 50.65%, respectively. After adjusted for confounding factors, vitamin D intervention was associated with a lower risk of hypovitaminosis D, with OR (95% CI) of 0.191 (0.180, 0.202) in children with therapeutic doses and 0.423 (0.404, 0.443) in those with supplementation doses, compared with children without vitamin D intervention. In addition, longer outdoor time was associated with a lower risk of hypovitaminosis D [0.479 (0.456, 0.504) for 60 min/d, 0.737 (0.701, 0.776) for 30–60 min/d], independent of vitamin D intervention. Conclusions: High prevalence of vitamin D deficiency was found in children living at high latitudes. Vitamin D intervention and outdoor activity are all negatively associated with children’s vitamin D deficiency. Routine vitamin D intervention combined with increased outdoor time might be an effective approach to prevent hypovitaminosis D among children, especially those at school, living at high latitudes.

Vitamin D Deficiency in Patients with Acute Myocardial Infarction: An Italian Single-Center Study

2015 ◽  
Vol 85 (1-2) ◽  
pp. 23-30 ◽  
Author(s):  
Aneta Aleksova ◽  
Rita Belfiore ◽  
Cosimo Carriere ◽  
Salam Kassem ◽  
Salvatore La Carrubba ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Primary Source ◽  
Sun Exposure ◽  
Female Gender ◽  
Developed Countries ◽  
Vitamin D Status ◽  
High Exposure

Abstract. Background: Hypovitaminosis D is a vitamin deficiency that has been increasing in developed countries; it was also suggested as an emerging risk factor for developing of atherosclerosis and acute myocardial infarction. The primary source of vitamin D is its cutaneous synthesis under exposure to sunlight. It has been suggested that 30 min of sun exposure twice weekly leads to sufficient vitamin D synthesis. The residents of Trieste (Italy) are well-known for their high exposure to sunlight in all seasons. We aimed to investigate the vitamin D status in subjects with acute myocardial infarction living in this area. Methods: Vitamin D status was identified in 478 subjects diagnosed with acute myocardial infarction. Results: The median serum 25-hydroxyvitamin D concentration was 14.5 [7.8 - 22.7] ng/mL. Vitamin D deficiency and insufficiency were present in 324 (68 %) and 107 (22 %) subjects, respectively. Vitamin D deficiency was less frequent among subjects enrolled in the period from July to the end of September (p < 0.001). In a multivariate analysis vitamin D deficiency was predicted by older age (p = 0.02), female gender (p = 0.002), higher body mass index (p = 0.05), autumn/winter sampling (p < 0.001), increased parathyroid hormone (p = 0.03) and alkaline phosphatase (p = 0.003). Conclusions: We observed very high prevalence of vitamin D deficiency among subjects with myocardial infarction in all seasons of enrollment. However, it was lower in the summer when sun exposure is higher. The exposure to sunlight may be a cost-saving therapeutic strategy for the management of vitamin D deficiency.

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