Vitamin D deficiency and glycemic control among patients with type 2 diabetes mellitus in Jazan City, Saudi Arabia
Received 31 January 2019
Accepted for publication 26 March 2019
Published 5 June 2019 Volume 2019:12 Pages 853—862
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Amy Norman
Peer reviewer comments 2
Editor who approved publication: Dr Antonio Brunetti
Hussain Darraj,1 Mohammed Badedi,1 Kirsten R Poore,2 Abdulrahman Hummadi,1 Abdullah Khawaji,1 Yahia Solan,3 Ibrahim Zakri,1 Abdullah Sabai,1 Majid Darraj,4 Dhayf Alrahman Mutawwam,1 Mohammed Daghreeri,1 Safaa Sayed,1 Wael Alaallah,1 Abdulaziz Alfadhly,5 Abdullah Alsabaani6
1Jazan Health Affairs, Ministry of Health, Jazan, Saudi Arabia; 2Institute of Development Sciences, Faculty of Medicine, University of Southampton, Southampton, UK; 3Medical Affairs, Jazan University Hospital, Jazan University, Jazan, Saudi Arabia; 4Department of Internal Medicine, College of Medicine, Jazan University, Jazan, Saudi Arabia; 5Diabetic Center, Prince Mansour Military Hospital, Taif, Saudi Arabia; 6Department of Family and Community Medicine, College of Medicine, King Khalid University, Abha, Saudi Arabia
Background: The prevalence of vitamin D deficiency (VDD) is predicted to be high in patients with type 2 diabetes mellitus (T2DM), but the exact figure is not known in Jazan, Saudi Arabia. Emerging data suggests that VDD plays a role in glycemic control. The aim of this study was to measure the prevalence of VDD among T2DM patients and to investigate its association with patients’ characteristics and glycemic control in Jazan.
Methods: This is an analytical cross-sectional study which recruited 309 patients with T2DM randomly from primary health care centers in Jazan. Logistic regression analysis was conducted to determine the VDD predictors and to examine the association of VDD and glycemic control.
Results: The VDD prevalence was found to be 60.8% in patients with T2DM. Age, gender, diabetic retinopathy (DR), dyslipidemia, glycemic control, and obesity were significantly associated with VDD, and all except obesity were independent predictors of VDD. There was a significant negative correlation between 25-hydroxyvitamin D and HbA1c. VDD was a significant independent predictor of poor glycemic control after adjustment for hypertension, DR, diabetic neuropathy, type of diabetes medication, diabetes duration, and education level.
Conclusion: In this Saudi Arabian population, VDD is highly prevalent in people with T2DM and is associated with poor glycemic control. Health education targeting patients with T2DM and national strategies regarding vitamin D fortification are needed to prevent VDD in Saudi Arabia. Earlier VDD diagnosis by health care providers may help to improve the outcome for patients with T2DM. Establishing the causal association between VDD and glycemic control and clarifying the biological role of vitamin D in T2DM are important aims for future studies.
Keywords: diabetes mellitus, T2DM, vitamin D deficiency, VDD, glycemic control, diabetes complication
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