Association of Serum Vitamin D Levels and Stress Fractures in Collegiate Athletes

Background: Low vitamin D levels along with high-intensity athletic training may put an athlete at increased risk for a stress fracture. Purpose: To assess whether supplementation with vitamin D is associated with a reduced risk of stress fractures in college athletes. We also assessed differences in vitamin D levels among athletes participating in outdoor versus indoor sports. Study Design: Cohort study; Level of evidence, 2. Methods: The study participants included 802 National Collegiate Athletic Association Division I intercollegiate athletes (497 men and 305 women) on a sports team for at least 1 semester from 2012 to 2018. All athletes who had a baseline vitamin D level in their medical record were included. Athletes with vitamin D levels <40 ng/mL were given vitamin D supplements. We assessed differences in the rate of stress fracture among those who maintained or improved vitamin D levels to ≥40 ng/mL and those who did not, as well as differences in average baseline vitamin D levels by sport type (indoor vs outdoor). Results: The rate of stress fracture was 12% higher (95% CI, 6-19; P < .001) for those who remained low in vitamin D compared with those who were low at baseline but improved their vitamin D status to ≥40 ng/mL. The rate of stress fracture was also 12% higher (95% CI, 5-18; P < .001) for those who had low vitamin D levels compared with those who maintained normal levels. The mean baseline vitamin D values were significantly higher for men participating in outdoor sports versus indoor sports. For men, the mean vitamin D level was 5.7 ng/mL higher (95% CI, 0.9-10.5; P = .01) in outdoor athletes. For women, the mean vitamin D level was 3.7 ng/mL higher (95% CI, –0.58 to 8.03; P < .04) for outdoor versus indoor sports. Conclusion: Study results indicated that correcting low serum vitamin D levels reduces the risk of stress fracture. This study also presented evidence that athletes who participate in indoor sports may be at greater risk for vitamin D deficiency than those who compete in outdoor sports.

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No correlation was observed between vitamin D levels and disability of patients with multiple sclerosis between latitudes 18° and 30° South

Arquivos de Neuro-Psiquiatria ◽

10.1590/0004-282x20160173 ◽

2017 ◽

Vol 75 (1) ◽

pp. 3-8 ◽

Cited By ~ 4

Author(s):

Yara Dadalti Fragoso ◽

Tarso Adoni ◽

Soniza Vieira Alves-Leon ◽

Samira L. Apostolos-Pereira ◽

Walter Oleschko Arruda ◽

...

Keyword(s):

Multiple Sclerosis ◽

Vitamin D ◽

Large Population ◽

Serum Vitamin ◽

Serum Levels ◽

Serum Vitamin D ◽

Control Subjects ◽

Vitamin D Levels ◽

The Mean ◽

25 Oh Vitamin D

ABSTRACT Objective: Vitamin D has taken center stage in research and treatment of multiple sclerosis (MS). The objective of the present study was to assess the serum vitamin D levels of a large population of patients with MS and controls living in a restricted tropical area. Methods: Data from 535 patients with MS and 350 control subjects were obtained from 14 cities around the Tropic of Capricorn. Results: The mean serum 25-OH vitamin D level was 26.07 ± 10.27 ng/mL for the control subjects, and 28.03 ± 12.19 ng/mL for patients with MS. No correlation was observed between vitamin D levels and the disability of patients over the disease duration. Conclusion: At least for the region around the Tropic of Capricorn, serum levels of vitamin D typically are within the range of 20 to 30 ng/mL for controls and patients with MS.

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Vitamin D levels in children with COVID-19: a report from Turkey

Epidemiology and Infection ◽

10.1017/s0950268821001825 ◽

2021 ◽

Vol 149 ◽

Author(s):

Aysegul Alpcan ◽

Serkan Tursun ◽

Yaşar Kandur

Keyword(s):

Vitamin D ◽

Vitamin D Deficiency ◽

Statistical Significance ◽

Serum Vitamin ◽

University Hospital ◽

Control Group ◽

Serum Vitamin D ◽

Vitamin D Levels ◽

Normal Vitamin ◽

The Mean

Abstract Several studies have demonstrated that higher levels of vitamin D are associated with better prognosis and outcomes in infectious diseases. We aimed to compare the vitamin D levels of paediatric patients with mild/moderate coronavirus disease 2019 (COVID-19) disease and a healthy control group. We retrospectively reviewed the medical records of patients who were hospitalised at our university hospital with the diagnosis of COVID-19 during the period between 25 May 2020 and 24 December 2020. The mean age of the COVID-19 patients was 10.7 ± 5.5 years (range 1–18 years); 43 (57.3%) COVID-19 patients were male. The mean serum vitamin D level was significantly lower in the COVID-19 group than the control group (21.5 ± 10.0 vs. 28.0 ± 11.0 IU, P < 0.001). The proportion of patients with vitamin D deficiency was significantly higher in the COVID-19 group than the control group (44% vs. 17.5%, P < 0.001). Patients with low vitamin D levels were older than the patients with normal vitamin D levels (11.6 ± 4.9 vs. 6.2 ± 1.8 years, P = 0.016). There was a significant male preponderance in the normal vitamin D group compared with the low vitamin D group (91.7% vs. 50.8%, P = 0.03). C-reactive protein level was higher in the low vitamin D group, although the difference did not reach statistical significance (9.6 ± 2.2 vs. 4.5 ± 1.6 mg/l, P = 0.074). Our study provides an insight into the relationship between vitamin D deficiency and COVID-19 for future studies. Empiric intervention with vitamin D can be justified by low serum vitamin D levels.

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Vitamin D levels in children with otitis media with effusion

QJM ◽

10.1093/qjmed/hcab094.017 ◽

2021 ◽

Vol 114 (Supplement_1) ◽

Author(s):

Ahmed Adly Mohamed ◽

Marwa Mohamed EL-Begermy ◽

Ahmed Abdelmoneim Teaima ◽

Mohamed Ali Abdelghafar

Keyword(s):

Vitamin D ◽

Otitis Media ◽

Otitis Media With Effusion ◽

Serum Vitamin ◽

Control Group ◽

University Hospitals ◽

Serum Vitamin D ◽

Vitamin D Levels ◽

25 Hydroxy Vitamin D ◽

The Mean

Abstract Objective To investigate the relationship between otitis media with effusion (OME) and serum vitamin D level in children. Methods This prospective case control study was conducted at Ain Shams University Hospitals between February 2018 and May 2019. The study population included 50 children with OME confirmed by tympanometry type (B) who will undergo adenotonsillectomy and grommet tube insertion compared to 50 children without OME confirmed by tympanometry type (A) who will undergo adenotonsillectomy. Measurement of serum 25-hydroxy vitamin D using electrochemiluminescence technique from a blood sample (3cm) taken from them on the day of surgery. Results In this study, the mean age of the cases was 4.24 ± 0.80 and 5.34 ± 1.19 years for the controls besides 23 (46%) of the OME group were boys and 27 (54%) were girls, compared with 29 (58%) boys and 21 (42%) were girls in the control group. The mean levels of vitamin D in children with OME was 16.24 ± 7.14 ng/mL and in children in the control group was 15.89 ± 5.84 ng/mL (P = 0.815) and it was statistically non significant. Conclusion There was no significant relation between vitamin D serum level and the incidence of OME in children.

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The effects of indoor and outdoor sports participation and seasonal changes on vitamin D levels in athletes

SAGE Open Medicine ◽

10.1177/2050312119837480 ◽

2019 ◽

Vol 7 ◽

pp. 205031211983748 ◽

Cited By ~ 9

Author(s):

Canan Gönen Aydın ◽

Yaşar Mahsut Dinçel ◽

Yavuz Arıkan ◽

Süleyman Kasım Taş ◽

Serdar Deniz

Keyword(s):

Vitamin D ◽

Female Athletes ◽

Winter Season ◽

Serum Vitamin ◽

Sports Participation ◽

Seasonal Effects ◽

Serum Vitamin D ◽

Outdoor Sports ◽

Vitamin D Levels ◽

Indoor And Outdoor

Objective: Nowadays, people tend to spend more time in the closed areas and benefit less from sunlight. In this study, we examined the results of vitamin D measurements of athletes from different disciplines in different months and aimed to determine if the synthesis of vitamin D decreases or not according to exercise environment and month. Methods: The study was conducted in participants aged 5–52 years. A total of 555 elite-level sportsmen who were admitted to our Sports Medicine Clinic in the study participated in this study. Indoor and outdoor environmental and seasonal effects on the measurements in different months were statistically evaluated. Independent-samples test and definitive statistics were used for statistical analyses and a p-value less than 0.05 has been considered significant. Results: The study group consisted of 229 male and 326 female athletes. The serum 25-hydroxyvitamin D concentration was observed; 120 (21.6%) athletes have severe serum vitamin D deficiency (<11–20 ng/mL). Vitamin D levels were not significantly different from outdoor athletes (393; 70.8%). Winter measurements of vitamin D levels were significantly lower than those measured in autumn (p = 0.000). Conclusion: Increasing vitamin D levels are very important especially in participating athletes and additional supplements are recommended whenever necessary. Gender and indoor/outdoor sports participation showed no statistically significant outcomes on vitamin D levels. However, winter season had a negative effect on vitamin D levels. Therefore, adequate precautions should be taken to increase vitamin D, especially during winter, to maintain the best performance of the athletes.

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Vitamin D Insufficiency in Disease Severity and Prognosis of the Patients With SARS Corona Virus-2 Infection

ACTA MEDICA IRANICA ◽

10.18502/acta.v59i11.7779 ◽

2021 ◽

Author(s):

Ali Asgari ◽

Ebrahim Hazrati ◽

Saeed Soleiman-Meigooni ◽

Mohsen Rajaeinejad ◽

Sam Alahyari ◽

...

Keyword(s):

Vitamin D ◽

Disease Severity ◽

Odds Ratio ◽

Laboratory Data ◽

Serum Vitamin ◽

Serum Vitamin D ◽

Corona Virus ◽

Vitamin D Levels ◽

The Mean ◽

General Wards

The global crisis caused by the SARS Corona virus-2 infection is continuing through 2021, with more than 3.5 million deaths. Several risk factors for this virus’s severity and death were documented, including diabetes, hypertension, and ischemic heart disease. To evaluate the relation between serum vitamin D3 level, the disease severity, and prognosis of the patients with SARS Corona virus-2 infection. Patients with COVID-19 were evaluated for serum vitamin D levels and laboratory data. Correlation between vitamin D levels and laboratory data with disease severity and prognosis was assessed. Cox and logistic regression tests, as well as ROC curves, were used for data analysis. Ninety-eight patients with Corona virus-2 disease (COVID-19), which consisted of sixty patients with moderate COVID-19 in the general wards, and thirty-eight patients with severe COVID-19 in the intensive care unit (ICU), were evaluated. The mean age in the general wards was lower than in ICU (60.96±14.86 compared to 67.94±16.46, P=0.001), and the mean serum vitamin D level in the patients admitted in the general wards was higher than in the ICU (31 ng/mL compared to 20.57 ng/mL, P=0.003). Furthermore, vitamin D deficiency (25 (OH) D <25 ng/ml) significantly increased the risk of severe disease. (odds ratio=2.91, P=0.019) and mortality (odds ratio=3.64, P=0.026). Vitamin D deficiency is a risk factor for disease severity and poor prognosis in COVID-19. Vitamin D levels of 25 ng/mL can be used as a cut-off value for predicting severity and prognosis.

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Serum vitamin D and immunoglobulin E levels in children of allergic rhinitis: a case-control study from Central India

International Journal of Contemporary Pediatrics ◽

10.18203/2349-3291.ijcp20212044 ◽

2021 ◽

Vol 8 (6) ◽

pp. 1038

Author(s):

Payasvi Baweja Sachdeva ◽

Sheloj Joshi ◽

Shweta Anand

Keyword(s):

Vitamin D ◽

Case Control Study ◽

Immunoglobulin E ◽

Serum Vitamin ◽

Serum Ige ◽

Serum Vitamin D ◽

Vitamin D Levels ◽

Significant Difference ◽

The Mean ◽

Control Study

Background: Allergic rhinitis (AR) is the commonest type of non-infective rhinitis. Genetic and environmental factors play an important role in the development of the disease. Researchers are having interest in knowing the role of vitamin D in the pathogenesis of allergy. Immunoglobulin E (IgE) is integral to the pathogenesis of allergic disorders. However, the relationship between serum IgE levels and AR is still a matter of debate. Thus, this study aimed to know serum IgE and serum 25 (OH) vitamin D levels in patients with clinically diagnosed AR and control group.Methods: A case-control study was performed from May 2019 to October 2019 in LNMC and JK hospital. All 54 children with physician diagnosed AR aged 12 to 18 years of both genders who have come in the OPD (total enumeration sampling) during the above mentioned period were enrolled into the study and their 54 healthy counterparts are taken as controls. Other parameters such as age, gender, occupation and region of residence were also compared between the groups.Results: This study found highly significant difference in the mean serum IgE levels while there is a significant difference in the mean serum vitamin D levels between two groups.Conclusions: The study group with AR had significantly higher mean level of serum IgE and lower mean serum vitamin D levels as compared to control groups. However, upon stratification of vitamin D levels, the differences were insignificant. Further studies should be conducted to know the value of IgE as a prognostic factor of AR severity and to throw more light on association of vitamin D with AR.

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Is there an association between vitamin D and liver fibrosis in patients with chronic hepatitis C?

Arquivos de Gastroenterologia ◽

10.1590/s0004-2803.2017v54n1-11 ◽

2017 ◽

Vol 54 (1) ◽

pp. 57-59 ◽

Cited By ~ 2

Author(s):

Kalinca da Silva OLIVEIRA ◽

Caroline BUSS ◽

Cristiane Valle TOVO

Keyword(s):

Vitamin D ◽

Chronic Hepatitis ◽

Hepatitis C ◽

Liver Fibrosis ◽

Chronic Hepatitis C ◽

Serum Vitamin ◽

Inflammatory Activity ◽

Serum Vitamin D ◽

Vitamin D Levels ◽

Study Results

ABSTRACT BACKGROUND Vitamin D is known for its immunomodulatory, anti-inflammatory and antifibrotic properties, which are quite relevant in the pathogenesis and treatment of many causes of chronic liver disease. OBJECTIVE This study aimed to evaluate the association between serum vitamin D levels and the histopathological findings in patients with chronic hepatitis C virus infection. METHODS Cross-sectional study composed of patients with chronic hepatitis C. All patients underwent vitamin D 25 dosage and anthropometric data analysis. Liver biopsy was performed in a maximum 36-month period before inclusion in the study. RESULTS Of the 74 patients included in the study, 45 (60.8%) were women, mean age was 57.03±9.24 years, and 63 (85.1%) were white. No association was observed between the serum levels of vitamin D and inflammatory activity (P=0.699) nor with the degree of liver fibrosis (P=0.269). CONCLUSION In this study, no association was observed between vitamin D and inflammatory activity, as well as the degree of liver fibrosis, in patients with chronic hepatitis C.

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Prospective Evaluation of Vitamin D Levels and Stress Injury in Collegiate Female Long-Distance Runners

Foot & Ankle Orthopaedics ◽

10.1177/2473011419s00298 ◽

2019 ◽

Vol 4 (4) ◽

pp. 2473011419S0029

Author(s):

Elizabeth L. McDonald ◽

Kathleen Jarrell ◽

Steven M. Raikin ◽

Kristen Nicholson ◽

Daniel Fuchs ◽

...

Keyword(s):

Vitamin D ◽

Stress Fracture ◽

Serum Levels ◽

Vitamin D Insufficiency ◽

Stress Fractures ◽

Distance Runners ◽

Long Distance ◽

Stress Injury ◽

Vitamin D Levels ◽

The Mean

Category: Lesser Toes, Midfoot/Forefoot, Sports Introduction/Purpose: The incidence of stress injury in female runners is reported in up to 21% of competitive runners, with female runners at higher risk for stress injury than men. Bone metabolism is closely linked with vitamin D, which may play a role in the high prevalence of stress fractures in female runners. Although runners who train outdoors in the southeastern US have adequate vitamin D levels, no study to date has evaluated runners in northeastern US. The aim of the study was to prospectively evaluate the relationship between 25-OH vitamin D serum levels and the incidence of stress injury in a cohort of collegiate competitive long-distance runners. Methods: 101 female collegiate runners from 7 Northeastern US colleges competing in varsity cross country were enrolled. Surveys were collected from all the study participants at the start of the fall cross country season reviewing demographics, weekly mileage, and medical history, including previous stress fracture incidence. Additionally, baseline (“summer”) serum 25-hydroxy vitamin D levels were obtained. Subjects insufficient in vitamin D (<30ng/mL) were supplemented with cholecalciferol (D3) 50,000 units weekly for 8 weeks and 2,000 units daily for an additional 1 month. In subjects with vitamin D insufficiency, repeat labs were performed at 3 months and repeat surveys distributed. To account for variation in season and geographical location, all subjects underwent repeat vitamin D labs at 6 months (”winter”). Fisher’s exact test was used to determine whether vitamin D levels were correlated with incidence of stress fracture. Results: 91/101 (90%) subjects with mean BMI of 20.5 and average age of 20 years completed all study requirements. The mean summer and winter vitamin D serum levels were 64.0 ng/mL (SD 16.6; range 28.9-112.9) and 45.0 ng/mL (SD 13.8; range 20.1- 90.6), respectively. One subject (1%) in the summer and 9 subjects (10%) in the winter were supplemented for vitamin D insufficiency. 7/10 (70%) insufficient subjects and 28/81 (35%) vitamin D sufficient subjects reported a stress fracture during the study period. Patients that had an insufficient vitamin D result were significantly more likely to have a stress fracture during the study period (p=0.041; Table 1). The mean change in vitamin D level from summer to winter was -19.7 (SD 14.4; range -60.5- 60.7). Conclusion: The high rate of stress fractures in this cohort of collegiate female long-distance runners is greater than previously reported. Runners who are vitamin D insufficient are at a higher risk to incur a stress fracture. The results of the study also highlight the considerable seasonal variance in vitamin D levels amongst female collegiate long-distance runners in the northeastern US. Further study is needed to determine whether vitamin D supplementation reduces the risk of stress fractures.

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Serum Vitamin D, Calcium and Phosphate among children with pneumonia

Annals of Health Research ◽

10.30442/ahr.0501-10-40 ◽

2019 ◽

Vol 5 (1) ◽

pp. 93-101

Author(s):

Oluwakemi Tolu Adegoke ◽

Jerome Boluwatife Elusiyan ◽

Joshua Aderinsola Owa ◽

Perpetua Okwuchi Obiajunwa ◽

Tewogbade Adeoye Adedeji ◽

...

Keyword(s):

Vitamin D ◽

Plasma Levels ◽

Serum Vitamin ◽

Severe Pneumonia ◽

Plasma Calcium ◽

Healthy Controls ◽

Serum Vitamin D ◽

Vitamin D Levels ◽

The Mean ◽

Apparently Healthy

Background: Vitamin D is partly responsible for maintaining calcium and phosphate homeostasis but has been shown to have immune modulatory functions. Objective: To measure serum levels of vitamin D, and plasma levels of calcium and phosphate in children with pneumonia and compare with those of apparently healthy controls. Methods: A cross-sectional study involving seventy-six children with pneumonia, matched with 76 apparently healthy controls. Results: There was no statistically significant difference in the mean serum vitamin D levels between the cases and the controls (t = 1.190, p = 0.236). The mean serum vitamin D level was significantly higher in children with non-severe pneumonia than in those with severe pneumonia (t = 3.299, p = .002). The mean serum vitamin D level was higher among the controls than those with severe pneumonia (t = 2.674, p = 0.009). The mean plasma calcium and phosphate levels in the controls were significantly higher than in the cases (t = 2.528, p = .013 and t = 4.594, p < .001 respectively). Plasma calcium and phosphate levels did not vary with the severity of pneumonia. Pneumonia was independently associated with the occurrence of hypocalcaemia and hypophosphataemia (OR = 4.366, 95% CI = 1.851-10.295, p = 0.001; OR = 7.355, 95% CI = 1.545-35.027, p = 0.01 respectively). Conclusion: Children with severe pneumonia had lower levels of vitamin D than those with the non-severe disease. Derangements in plasma levels of calcium and phosphate are common in children with pneumonia, and these abnormalities occur independently of low vitamin D levels.

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The Relationship Between Serum Vitamin D Level and Severity of Bronchiolitis in Infants Being Referred to in Bandar Abbas Children’s Hospital, Iran

International Electronic Journal of Medicine ◽

10.34172/iejm.2020.17 ◽

2020 ◽

Vol 9 (3) ◽

pp. 96-100

Author(s):

Mohammad Bagher Rahmati ◽

Mehran Ahmadi ◽

Seyed Alireza Sobhani ◽

Morteza Bakhshi ◽

Hosein Hamadiyan ◽

...

Keyword(s):

Vitamin D ◽

Serum Vitamin ◽

Serum Levels ◽

Children's Hospital ◽

Serum Vitamin D ◽

Vitamin D Levels ◽

Children’S Hospital ◽

The Mean ◽

Bandar Abbas ◽

The Relationship

Background: The present study aimed to investigate the relationship between the serum vitamin D level and the severity of bronchiolitis in infants. Materials and Methods: The population of this descriptive-analytical study included all infants within the age range of 1 month to 24 months old with bronchiolitis hospitalized in Bandar Abbas children’s hospital in 2018-2019. According to the exclusion and inclusion criteria, patients were entered in the study and diagnosed with bronchiolitis by a pediatric infectious disease specialist. Then, their serum levels of vitamin D were measured as well. Results: Of the 85 patients, 62.4% and 37.6% were males and females, respectively. The mean serum level of vitamin D was 29.74±13.44 ng/mL. In addition, the mean age in groups with mild-, moderate-, and severe-intensity was 9.27±4.52 months, 5.12±3.95 months, and 3.16±1.16 months (P<0.001), respectively. Further, the Spearman’s correlation between age and serum vitamin D levels was r = 0.05 (P<0.001). Based on the results, there was a statistically significant difference between the mean age in the two study groups (P<0.001). Finally, a statistically significant association was found between the severity of bronchiolitis and vitamin D status (P=0.007). Conclusion: According to the results of the present study, more than half of the infants admitted to the diagnosis of bronchiolitis had insufficient serum levels of vitamin D. There was also a significant association between the severity of bronchiolitis and serum vitamin D levels.

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