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Background: Rheumatoid arthritis (RA) is most common type of inflammatory arthritis. It is chronic autoimmune disease that affects joints as well as extra-articular structures. The prevalence of this condition could be due to both genetic and non-genetic factors (e.g., environmental, viral, and hormonal). Aims and Objectives: The aim of the study was to determine and correlate 25(OH) D level with disease severity in patients of RA. Materials and Methods: The prospective observational study consists of 70 patients of RA and 70 healthy controls. Assessed level of 25(OH) D, C-reactive protein (CRP), anti-cyclic citrullinated peptide (CCP), erythrocyte sedimentation rate (ESR), and Disease Activity Score (DAS) 28-CRP score were compared in both cases and controls. Correlation of Vitamin D level with parameters such as CRP, Anti-CCP, and ESR was performed. Correlation between Vitamin D level deficiency and disease activity among the RA patients was assessed. Results: The mean age of patients in the RA group was 37.77±13.31 years. The mean CRP in cases was 40.57±25.94 mg/L and in controls was 3.26±1.95 mg/L with significant intergroup difference (P<0.001). The mean anti-CCP in cases was 62.18±27.21 U/mL and in controls was 4.99±1.52 U/mL with significant intergroup difference (P<0.001). The mean 25(OH) D level in cases was 12.65±5.88 and in controls was 32.18±10.22. The 25(OH) D was significantly decreased in cases than controls (P<0.001). A significant inverse relationship between serum 25(OH) D levels and DAS28 was observed. Receiver operating characteristic (ROC) curves results showed that 25(OH) D<11.7 ng/mL indicates severe disease activity (Area under ROC curve=84%, Sensitivity 77.78%, and specificity 83.33%,). 25(OH) D between 11.7 ng/mL and 19.83 ng/mL indicates moderate disease activity. 25(OH) D˃19.83 ng/mL indicates low disease activity value below 4.13 is alarming situation. Conclusion: The study reveals high prevalence of Vitamin D deficiency and insufficiency in RA patients. There is also significant inverse correlation exist between serum Vitamin D levels and RA disease activity. Vitamin D level is good disease activity predictor in patients of RA. [ABSTRACT FROM AUTHOR]

Aim: To study the effect of vitamin D supplementation in severity and control of bronchial asthma in children in Bihar region Methods: A cross-sectional, prospective study was conducted in the Department of pediatrics, Vardhman institute of Medical Sciences, Pawapuri, Nalanda, Bihar, India for 1 year, after taking the approval of the protocol review committee and institutional ethics committee. 53 asthmatic patients and 53 healthy controls were included in this study. The level of serum vitamin D in both groups was measured by radioimmunoassay (RIA) method at the reference lab and was categorized as sufficient (> 30 ng/ml), insufficient (20 to 30 ng/ml), or deficient (< 20 ng/ml). The severity of asthma was also stratified according to the asthma guideline into four grades of intermittent or mild, moderate, severe persistent. Results: Regarding rate of admission, 13.2% of patients were hospitalized once, 9.4% of patients were hospitalized twice, and 1.9% of them were also hospitalized three times. In the patients group and regarding the severity of asthma, 11.3% were classified as mild asthma, 45.3% as moderate asthma, and 43.4% as severe asthma. Also regarding control status of asthma, the disease was controlled in 18.9 %, partially controlled in 34.0 %, and uncontrolled in 47.2 %. According to the level of disease attack risk, 5 of 31 children aged less than 5 years (16.1%) classified as high-risk, while 7 of 22 children older than 5 years (31.8%) classified as high risk. Assessing the serum level of vitamin D showed that the asthmatic children had significantly lower level of vitamin D compared to normal cases (14.53 ± 8.10 ng.ml versus 22.45 ± 13.46 ng/ml, p < 0.001). Also, in the groups with and without asthma, the prevalence of vitamin D deficiency was 73.6 and 49.1%, and the prevalence of vitamin D insufficiency was 18.9 and 18.9 %, while normal vitamin D level was revealed in 7.5 and 32.1%, respectively with a significant difference (p = 0.005). In this regard, mean serum level of vitamin D in the patients with mild asthma was 12.85 ± 7.06 ng/ml, in the group with moderate asthma was 16.98 ± 8.63 ng/ml, in the patients with severe asthma was 12.42 ± 7.52 ng/ml, and in those with persistent asthma was 12.01 ± 5.00 ng/ml (p = 0.25). Conclusion: Vitamin D deficiency and insufficiency is a common finding among asthmatic children that may be associated by the physiological mechanism of this phenomenon. In fact, it seems that the use of supplement vitamin D can prevent progression of childhood asthma. [ABSTRACT FROM AUTHOR]