Biochemical abnormalities and Vitamin D levels in sputum positive pulmonary tuberculosis

Background: Tuberculosis has been associated with various biochemical abnormalities including low hyponatremia, serum albumin, hypocalcaemia, low vitamin D levels. Methods: 50 patients aged ? 18years of age with of sputum positive pulmonary tuberculosis were included in the study. Renal function, liver function, electrolytes and Vitamin D levels were measured at 0, 2 and 6 months of anti-tuberculosis treatment. The qualitative variables were analysed by chi-square tests. The quantitative variables were analysed by using paired t test. Five percent probability level was considered as statistically significant i.e., p<0.05. Results: The mean age was 38.5 years with a male to female ratio of 1.08:1. Hyponatremia was present in 24% of the patients. The mean total serum protein value were 6.720.89,7.420.74 and 8.150.68 g/dl and serum albumin of 2.970.50, 3.370.39 and 3.750.37 g/dl respectively at 0, 2 and 6 months. The mean serum calcium values observed were 8.20.63, 8.820.68 and 9.450.63 mg/dl at 0, 2 and 6 months respectively. The mean values for vitamin D at 0, 2 and 6 months were 9.146.94, 15.336.42 and 23.176.86 ng/ml respectively. 92% of the patients had low serum levels of vitamin D and 66% of the patients had serum vitamin D levels less than 10 ng/ml at presentation. Conclusion: Various biochemical abnormalities including hyponatraemia, low serum albumin and protein levels and low serum calcium levels are seen in pulmonary tuberculosis. Vitamin D levels are significantly lower in patients with TB and there is a significant improvement in the vitamin D levels with treatment of TB.