Indian Journal of Medical Research

ORIGINAL ARTICLE
Year
: 2013  |  Volume : 138  |  Issue : 6  |  Page : 853--860

Serum vitamin-D predicts insulin resistance in individuals with prediabetes


Deep Dutta, Indira Maisnam, Ankit Shrivastava, Anirban Sinha, Sujoy Ghosh, Pradip Mukhopadhyay, Satinath Mukhopadhyay, Subhankar Chowdhury 
 Department of Endocrinology & Metabolism, Institute of Postgraduate Medical Education & Research & SSKM Hospital, Kolkata, India

Correspondence Address:
Deep Dutta
Room-9A, 4th floor, Ronald Ross Building, Department of Endocrinology & Metabolism, Institute of Postgraduate Medical Education & Research & SSKM Hospital 244, AJC Bose Road, Kolkata 700 020
India

Background & objectives: Patients with diabetes and vitamin-D insufficiency have increased insulin resistance. Similar observations among individuals with prediabetes are not well documented. The aim of this study was to find the occurrence of vitamin-D insufficiency/deficiency among individuals with prediabetes and to evaluate the relationship between vitamin-D status and insulin resistance. Methods: One hundred fifty seven individuals with prediabetes who fulfilled all the inclusion and exclusion criteria underwent clinical examination, anthropometric measurements (waist circumference, waist-hip ratio, waist-height ratio) and blood sampling after overnight fast for estimation of fasting blood glucose, fasting insulin, 25(OH)vitamin-D, intact parathyroid hormone (iPTH) and lipid profile. One hour post 75 g glucose (1hPG) blood glucose during oral glucose tolerance test was measured. Results: Vitamin-D deficiency/insufficiency was found in 115 (73.25%) individuals with prediabetes. Severe vitamin-D deficiency (<10 ng/ml) was seen in 14.65 per cent individuals. Individuals with the lowest vitamin-D levels (<10 ng/ml) had the highest insulin resistance (HOMA2-IR: 2.04 ± 0.67). Serum 25(OH)D had a statistically significant inverse correlation with insulin resistance (HOMA2-IR; r=-0.33; P=0.008), and positive correlation with insulin sensitivity (QUICKI; r=0.39; P=0.002), after adjusting for BMI and HbA1c. There was no correlation between vitamin-D status and estimated beta cell mass (HOMA-β). The mean waist-height ratio among individuals with prediabetes was 0.57 (normal<0.5) indicating a high risk of cardiovascular morbidity. Individuals with elevated 1hPG>155 mg/dl had significantly higher BMI and worse insulin resistance, and 1hPG correlated well with 2 hour post glucose blood glucose (r=0.57; P<0.001). Interpretations & conclusions: Vitamin-D deficiency/insufficiency may have some role in the development/worsening of insulin resistance in individuals with prediabetes in our country who have a high cardiovascular risk. Prospective studies on a large group of individuals need to be done to confirm the findings.


How to cite this article:
Dutta D, Maisnam I, Shrivastava A, Sinha A, Ghosh S, Mukhopadhyay P, Mukhopadhyay S, Chowdhury S. Serum vitamin-D predicts insulin resistance in individuals with prediabetes.Indian J Med Res 2013;138:853-860


How to cite this URL:
Dutta D, Maisnam I, Shrivastava A, Sinha A, Ghosh S, Mukhopadhyay P, Mukhopadhyay S, Chowdhury S. Serum vitamin-D predicts insulin resistance in individuals with prediabetes. Indian J Med Res [serial online] 2013 [cited 2019 Nov 13 ];138:853-860
Available from: http://www.ijmr.org.in/article.asp?issn=0971-5916;year=2013;volume=138;issue=6;spage=853;epage=860;aulast=Dutta;type=0