J. Doucet

Hypoglycaemia and dementia in diabetic patients.

Diabetes and dementia, which have a complex relationship between them, are undergoing extensive growth in their fields. The occurrence of hypoglycaemia, the potential severity of which has just been pointed out in some recent studies, must be included in these relationships. In fact, diabetes is the cause of decline in cognitive functions and most certainly is involved in the occurrence of vascular dementia. The brain, which is highly dependent on glucose for its metabolism, is particularly vulnerable to hypoglycaemia in children and the elderly. Animal studies and pathoanatomical observations confirm the clinical impression of the reality of genuine post-hypoglycaemic encephalopathy. The impact of mild hypoglycaemia however is being debated. Lastly, the existence of dementia promotes the occurrence of hypoglycaemia due to disorders related to eating habits or poor treatment management. This hypoglycaemic risk however must not constitute a pretext for exaggerated laxity in achieving the blood glucose objectives.

Lactic acidosis: relationship between metformin levels, lactate concentration and mortality.

The role of metformin in lactic acidosis is regularly questioned. Arguments against a causal role for metformin in lactic acidosis occurrence are the lack of correlation between plasma metformin and lactate levels, as well as between metformin plasma levels and mortality. We aim to analyse these correlations in a large series of lactic acidosis cases recorded in the French nationwide pharmacovigilance database.

Retinopathy, nephropathy, peripheral neuropathy and geriatric scale scores in elderly people with Type 2 diabetes.

To analyse the relationships between retinopathy, nephropathy, peripheral neuropathy and geriatric scale scores in elderly people with Type 2 diabetes.

Primary care management of non-institutionalized elderly diabetic patients: The S.AGES cohort – Baseline data

AIM S.AGES is a multicenter prospective cohort study of non-institutionalized patients aged 65 and over with atrial fibrillation, type 2 diabetes or chronic pain. Its objective is to describe the medical management in primary care. This article presents the baseline characteristics of subjects in the diabetes subcohort and compares the results to those from cohorts of older diabetic patients. METHODS From April 2009 to June 2011, 983 patients were included in the diabetes subcohort by 213 primary care providers. Demographic data, geriatric parameters and the history, characteristics and treatment of the diabetes were recorded at baseline. RESULTS The mean age was 76.7 ± 5.9 years. Most patients were living independently, with no cognitive impairment and in relatively good health. The duration of diabetes was 11.3 ± 8.7 years with average HbA1c of 6.9 ± 1.0%. 20% of patients had macrovascular disease, 33% renal failure, 14.6% ocular complication and 7.1% neuropathy. The first-line antidiabetic treatment was metformin (61.2%) and 18% of patients had used insulin. Treatment intensified with the worsening of diabetic symptoms. When compared to those from French and North American cohorts, the results showed increased complications and use of insulin with age, disease duration and severity. CONCLUSION Due to the method of recruitment, S.AGES patients were generally healthy with well-controlled diabetes. However, the results were consistent with those from other cohorts. Three-year follow-up is expected to study the management of diabetic patients aged 65 and over in primary care.

Cardiovascular Events and Geriatric Scale Scores in Elderly (70 Years Old and Above) Type 2 Diabetic Patients at Inclusion in the GERODIAB Cohort

OBJECTIVE To analyze the relationships between cardiovascular complications and geriatric scale scores in French elderly (≥70 years of age) type 2 diabetic patients at inclusion in the GERODIAB cohort. RESEARCH DESIGN AND METHODS GERODIAB is the first French multicenter, prospective, observational survey designed to analyze the influence of glycemic control on morbidity/mortality in type 2 diabetic patients aged ≥70 years during a 5-year follow-up period. This study analyzed the relationships between classical macroangiopathic complications and geriatric scale scores in 987 patients at baseline, using bivariate and multivariate analyses. RESULTS Cardiac ischemia (31.2%) was significantly associated with impaired activities of daily living (ADL) scores (P < 0.001). Stepwise logistic regression included hypercholesterolemia, ADL, sex, and hypertension successively (70.3% concordance; P < 0.001). Heart failure (10.1%) was associated with impaired Mini Mental State Examination (MMSE), instrumental ADL (IADL) (P < 0.05), and ADL scores (P < 0.001). With the logistic model, waist circumference, age, and HDL cholesterol were significant factors (70.7% concordance; P < 0.001). Arterial disease of the lower limbs (25.6%) was associated with impaired IADL and ADL scores (P < 0.001). Significant factors using the logistic model were duration of diabetes, IADL score, hypertension, and sex (62.8% concordance; P < 0.001). Cerebral ischemia (15.8%) was associated with impaired MMSE, Mini Nutritional Assessment, ADL, and IADL scores (P < 0.01). IADL, sex, hypertension, and ADL were included in the logistic model successively (65.6% concordance; P < 0.001). CONCLUSIONS In this specific population, impaired geriatric scale scores were found to be associated with classical macrovascular complications, notably using multivariate analyses. This suggests the benefits of thorough screening and management of cognitive and functional decline in elderly type 2 diabetic patients.

Medical Treatments of Elderly, French Patients with Type‐2 Diabetes. Results at Inclusion in the GERODIAB Cohort

Prevalence of diabetes in the elderly increases, and half of the French diabetics are over the age of 75 years. The GERODIAB study is the first French multicentre, prospective, observational study designed to analyse over 5 years the influence of glycaemic control on morbidity–mortality in type 2 diabetics patients 70 years old and over. This study analysed the diabetic and geriatric factors associated with the treatment modalities, particularly insulin, at inclusion in the cohort. The cohort of 987 type 2 diabetics was divided into three groups according to the method of treatment. Slightly fewer than one‐third of these patients (26.4%) were treated with insulin alone, 31% received insulin and oral antidiabetic drugs, and 42.7% oral antidiabetic drugs alone. The patients that received insulin alone were significantly older, had poorer glycaemic control (HbA1c = 7.9 ± 1.4, 7.8 ± 1.0 and 7.1 ± 1.2%, respectively; P < 0.001) and had greater alterations of glomerular filtration rate (GFR). HbA1c was below 6.5% in 15% of patients and 37.3% of patients had a GFR below 60 mL/min. The patients treated with insulin alone had significantly more hypoglycaemic episodes (respectively 53.3, 36.3 and 19.5%, P < 0.001), retinopathy, cardiovascular involvement and more specific geriatric complications, such as cognitive disorders (respectively 34.1, 31.4 and 23.6%, P = 0.006). In this specific population of elderly type 2 diabetic patients, diabetic and geriatric conditions significantly differed between the types of drug treatments. Considering low values of HbA1c and GFR, some patients seemed overtreated and other patients received inappropriate drugs.

Predicting factors of hypoglycaemia in elderly type 2 diabetes patients: Contributions of the GERODIAB study

The burden of hypoglycaemia is important, particularly in elderly type 2 diabetes (T2D) patients. Unfortunately, however, few studies are available concerning this population. GERODIAB is a prospective, multicentre, observational study that aims to describe the 5-year morbidity and mortality of 987 T2D patients aged 70 years and older. After analyzing the frequency of and factors associated with hypoglycaemia in the 6 months prior to study inclusion, it was found that hypoglycaemia was associated with retinopathy, lower levels of LDL cholesterol and altered mini-Geriatric Depression Scale (GDS) scores.

Association between Cardiovascular Drugs and Chronic Kidney Disease in Non‐Institutionalized Elderly Patients

Concern about the renal safety of commonly used cardiovascular drugs with demonstrated clinical benefit appears to be an obstacle to their use in the elderly. The objective was to describe the relationship between cardiovascular drugs and chronic kidney disease (CKD) in elderly individuals in the real‐life setting. This is an ancillary study of the prospective non‐interventional S.AGE (aged individuals) cohort. General physicians were free to prescribe any drug their patients needed. The participants were non‐institutionalized patients aged 65 years and older treated by their primary physician for either chronic pain or atrial fibrillation or type 2 diabetes mellitus. The estimated glomerular filtration rate (eGFR) derived from the CKD‐EPI formula was determined at inclusion and every year during 2 years of follow‐up. This study comprised 2505 patients aged 77.8 ± 6.2 years. At inclusion, the factors associated with CKD (eGFR < 60 ml/min/1.73 m2) in multivariate analysis were age, female gender, hypertension, heart failure, history of atherothrombotic disease and renin angiotensin system blockers, loop diuretics and calcium channel inhibitors. Introduction of each of these three drug classes during the follow‐up period led to only a small decrease in the eGFR: −3.8 ± 12.7 (p < 0.0006), −2.2 ± 12.0 (p < 0.003) and −1.0 ± 13.4 ml/min./1.73 m2 (NS), respectively. Only the introduction of loop diuretics was associated with CKD (OR 1.91, 95% CI: 1.25–2.90; p = 0.002). Renal safety of cardiovascular drugs in the elderly appears acceptable and should not be a barrier to their use.

Cardiovascular Drugs and Metformin Drug Dosage According to Renal Function in Non‐Institutionalized Elderly Patients

Adaptation of drug dosage to kidney function is a common problem in general practice. The aim was to describe adaptation of cardiovascular drugs and metformin according to renal function and its association with mortality with regard to metformin in a cohort of elderly patients. This was an ancillary study to the S.AGES cohort made up of patients over 65 years of age managed by their general practitioner under real‐life conditions and followed up prospectively for 3 years. The medications studied were digoxin, spironolactone and metformin. Adaptation of their daily dose according to renal function (eGFR according to CKD/EPI) was compared to that recommended in the summaries of product characteristics (SPCs) or international scientific societies (ISS). A total of 900 patients were included, including 588 on metformin. At baseline, dose adjustment according to renal function was 100% and 87.6% (95% CI: 82.6–92.6) for patients on digoxin and spironolactone respectively. For metformin, only 71.3% (95% CI: 67.6–74.9) or 78.1% (95% CI: 74.7–81.4) of patients had their dosage adapted at inclusion according to their renal function depending on whether the SPCs or ISS recommendations were considered. During the 3‐year follow‐up period, 42/588 patients died (none from lactic acidosis). At inclusion, a metformin dosage not adapted for renal function according to ISS was not associated with an increase in all‐cause mortality (OR 1.7; 95% CI 0.6–5.0, p = 0.32). In conclusion, approximately one‐quarter of elderly patients treated with metformin do not have their dosage adapted for renal function according to ISS although there is no increase in mortality after follow‐up for 3 years.

Les analogues lents de l’insuline : une aide pour l’insulinothérapie des sujets âgés

Resume La necessite d’une insulinotherapie chez les sujets diabetiques âges est frequente, et souvent redoutee. Les objectifs sont d’ameliorer l’equilibre glycemique, tout en limitant le risque d’hypoglycemie et en conservant la qualite de vie. Les traitements prescrits doivent etre adaptes a leur etat de sante, avec un schema d’administration et un type d’insuline appropries. Comme le montrent de tres nombreuses etudes, les analogues lents de l’insuline repondent a ces exigences, et prennent une place croissante dans le traitement des patients diabetiques âges.