Vitamin B12 deficiency in long-term metformin treated type 2 diabetic patients: Prevalence and risk factors in a Tunisian population.

Objectives: To determine the prevalence of vitamin B12 deficiency in a Tunisian population with type 2 diabetes (T2D) on metformin treatment for more than three years and to identify its risk factors. Methods: This is a cross-sectional study conducted on 257 patients with T2D treated with metformin for at least three years. Patients were divided into two groups according to their vitamin B12 status. Low vitamin B12 was defined as ≤ 203 pg/mL. Results: The mean age of the patients was 59.8 ± 7.9 years. The mean duration of metformin use was 10.2 ± 5.2 years. The mean vitamin B12 level was 294.9 ± 156.4 pg/mL. The prevalence of vitamin B12 deficiency was 28.4%. Male gender, HbA1c < 7% and hyperhomocysteinemia were significantly associated with vitamin B12 deficiency (respectively p = 0.02, p < 0.001, p < 0.001). Homocysteine level was negatively correlated with vitamin B12 level (r = -0.2, p = 0.001). Dose and duration of metformin treatment, peripheral neuropathy and anemia were not associated with vitamin B12 deficiency. On multivariate analysis, HbA1c < 7% and hyperhomocysteinemia were independently associated with vitamin B12 deficiency (respectively OR = 3.2, 95%CI = [1.6-6.3] and OR = 2.3, 95%CI = [1.2-4.2]). Discussion: The prevalence of vitamin B12 deficiency in patients with T2D on metformin treatment was high. Hyperhomocysteinemia is associated with vitamin B12 deficiency suggesting that the deficit occurs at the tissue level.

Prednisolone or hydrocortisone replacement in patients with corticotrope deficiency fasting during Ramadan result in similar risks of complications and quality of life: a randomized double-blind controlled trial.

PURPOSE: The aims of the study were to compare the risk of complications and the quality of life in patients with corticotrope deficiency, who fasted during Ramadan. Both hydrocortisone and prednisolone were compared as treatments. METHODS: A randomized double-blind crossover clinical trial conducted in the department of Endocrinology of the University Hospital la Rabta in Tunis, during Ramadan 2018, on 53 patients with known corticotrope deficiency treated with hydrocortisone 20 mg per day and who were willing to fast during Ramadan. Patients were randomized into two groups; AB that received hydrocortisone twice daily for 14 days then prednisolone once daily with a placebo for 14 days and group BA that received the two treatments in the reverse order. Patients had to complete a daily follow-up sheet about their eating and sleeping habits, the occurrence of complications and blood glucose monitoring and also to respond to the AddiQoL questionnaire at the end of each treatment period. RESULTS: Fifty patients' data were analyzed; 29 men, mean age: 42.4 ± 13.3 years, mean duration of the disease: 8.1 ± 7.6 years. The frequency of complications, mean blood glucose levels and the quality of life did not differ on hydrocortisone compared to prednisolone after adjustment for the sequence of the treatment. CONCLUSIONS: the risks of Ramadan fasting in patients with corticotrope deficiency were the same on hydrocortisone or prednisolone.

The risk for hypoglycemia during Ramadan fasting in patients with adrenal insufficiency.

OBJECTIVES: The risk for hypoglycemia during Ramadan fasting in patients with adrenal insufficiency (AI) is not fully known. The aims of this study were to evaluate this risk objectively and to determine the associated factors. METHODS: This prospective case-crossover study included 25 women and 5 men with known and treated AI and a median age of 38.5 y. Patients underwent clinical examination and a fasting blood sample was collected to measure glucose, urea, creatinine, sodium, potassium, cortisol, growth hormone and free thyroxine. A 24-h continuous glucose monitoring system (CGMS) using iPro2 (Medtronic, Parsippany, NJ, USA) with Enlite sensor (Medtronic) was performed for each patient during a Ramadan fasting day then again during a nonfasting day. RESULTS: Interstitial glucose levels during the 24-h period, the fasting period, and the fasting period after exclusion of the 5 postprandial hours were significantly lower during the fasting day than on the nonfasting day. Hypoglycemia occurred in three patients (10%) during the fasting day but not during the nonfasting day (P = 0.23). Hypoglycemia was asymptomatic in two cases. Male sex was significantly associated with the occurrence of hypoglycemia. CONCLUSION: Interstitial glucose levels were lower during fasting in patients with AI. However, the risk for hypoglycemia was not increased.

Ramadan fasting in patients with adrenal insufficiency.

AIM: The risks of fasting during Ramadan in patients with adrenal insufficiency are unknown. The aims of this study were to evaluate these risks in such patients, to determine the risk factors and finally to set some recommendations. METHODS: It is a cross-sectional study about 180 patients with known and treated adrenal insufficiency. The patients responded to a 14-item questionnaire concerning their knowledge about the disease and fasting during the last month of Ramadan. RESULTS: There were 132 women and 48 men. The mean age was 47.6 ± 15.0 years (14-79). One hundred and thirty eight patients (76.7 %) were advised by their physician not to fast. Ninety-one patients (50.5 %) tried to fast. Complications occurred in 61 cases (67.0 %): asthenia in 88.5 % of cases, intense thirst in 32.8 %, symptoms of dehydration in 49.2 % and symptoms of hypoglycaemia in 18 %. One patient was hospitalized. Fifty-five patients (60.4 %) were able to fast for the whole month. Age, gender, duration of the disease, its primary origin, associated hypothyroidism, diabetes mellitus, hypertension or diabetes insipidus and daily dose of hydrocortisone did not significantly differ between fasters and non-fasters, full-month-fasters and partial-month-fasters, and fasters with complications and fasters without complications. The frequency of adequate knowledge about the disease was significantly higher in full-month-fasters vs. partial-month-fasters, and in fasters without complications vs. those with complications. CONCLUSION: In patients with adrenal insufficiency, fasting can cause complications especially if the level of knowledge about the disease is low.