Mortality amongst children and adolescents with type 1 diabetes in sub-Saharan Africa: The case study of the Changing Diabetes in Children program in Cameroon.

INTRODUCTION: Type 1 diabetes in Africa has been associated with high mortality attributed mainly to poor insulin access. Free insulin provision programs for people with type 1 diabetes have been introduced across Africa recently. We aimed to determine the mortality rate and associated factors in a cohort of children and adolescents with type 1 diabetes who receive free insulin treatment in sub-Saharan Africa. METHODS: We conducted a retrospective analysis using the Changing Diabetes in Children (CDiC) medical records in Cameroon between 2011 and 2015. RESULTS: The overall mortality rate was 33.0 per 1000 person-years (95% CI 25.2-43.2). Most deaths (71.7%) occurred outside of the hospital setting, and the cause of death was known only in 13/53 (24.5%). Mortality was substantially higher in CDiC participants followed up in regional clinics compared to the main urban CDiC clinic in Yaounde; 41 per 1000 years (95% CI 30.8-56.0) versus 17.5 per 1000 years (95% CI 9.4-32.5), and in those with no formal education compared to those who had some level of education; 68.0 per 1000 years (95% CI 45.1-102.2) versus 23.6 per 1000 years (95% CI 16.5-33.8). In Cox proportional multivariable analysis, urban place of care (HR = 0.23, 95% CI 0.09-0.57; p = 0.002) and formal education (HR = 0.42, 95% CI 0.22-0.79; p = 0.007) were independently associated with mortality. CONCLUSION: Despite free insulin provision, mortality remains high in children and adolescents with type 1 diabetes in Cameroon and is substantially higher in rural settings and those with no formal education.

Short-term effects of perindopril-amlodipine vs perindopril-indapamide on blood pressure control in sub-Saharan type 2 diabetic individuals newly diagnosed for hypertension: A double-blinded randomized controlled trial.

Poor blood pressure (BP) control contributes to complications in sub-Saharan African (SSA) type 2 diabetic individuals. Experts have advocated the use of combination therapies for effective BP control in these patients. The suggested combinations should include a RAAS antagonist and either a CCB or a thiazide diuretic; however, their efficacy is yet to be established in SSA. We investigated the short-term effects of two combination therapies on BP control in SSA type 2 diabetic individuals. This was a double-blinded randomized controlled trial conducted at the Yaoundé Central Hospital (Cameroon) from October 2016 to May 2017. We included type 2 diabetic patients, newly diagnosed for hypertension. After baseline assessment and 24-hour ABPM, participants were allocated to receive either a fixed combination of perindopril + amlodipine or perindopril + indapamide for 42 days. Data analyses followed the intention-to-treat principle. We included fifteen participants (8 being females) in each group. Both combinations provided good circadian BP control after 6 weeks with similar efficacy. Twenty-four-hour SBP dropped from 144 to 145 mm Hg vs 128 to 126 mm Hg with perindopril-amlodipine and perindopril-indapamide, respectively (P = 0.003 for both groups). Twenty-four-hour DBP dropped from 85 to 78 mm Hg (P = 0.013) vs 89 to 79 mm Hg (P = 0.006) in the same respective groups. No significant adverse effect was reported. A fixed initial combination of perindopril-amlodipine or perindopril-indapamide achieved similar effective BP control after 6 weeks in SSA type 2 diabetic individuals with newly diagnosed hypertension. Therefore, these combinations can be used interchangeably in this indication.

Glycemic control and correlates in a group of sub Saharan type 1 diabetes adolescents.

OBJECTIVES: This study aims to describe the prevalence of glycemic control and related factors in a population of Sub-Saharan African T1D patients. We carried out a cross-sectional study including children and adolescents from seven different centers of the Changing Diabetes in Children (CDiC) program. All children enrolled in the program where recruited after parental consent. Diabetes history, daily practice anthropometrics parameters and HbA1c were assessed for each participant. RESULTS: We enrolled 95 children adolescents, aged from 06 to 19 years. The mean HbA1c was 9.2 ± 2.5% and 67.4% of participant had poor glycemic control. There was an association between study level of the patients (p = 0.03), healthy eating habits (p < 0.001), diabetes duration (p < 0.001) and level of glycemic control on univariate analysis. On multivariate analysis, diabetes diagnosed for more than 2 years was associated to a good control compared to those with diagnosis that is more recent. Glycemic control of adolescents with type1 diabetes remain very poor in Cameroon despite the implementation of free diabetes care through the program CDiC.

Heart rate variability in hyperthyroidism on sub Saharan African patients: a case-control study.

OBJECTIVE: We aimed to determine heart rate variability in freshly diagnosed untreated hyperthyroidism patients. We enrolled 10 patients (9 females) and 10 matched controls for sex and age. Each eligible patient underwent five different tests according to Ewing battery tests for cardiac autonomic dysfunction assessment. HRV was assessed during each maneuver and on 24 h using a continuous electrocardiogram with automatic estimation of SDNN, RMSSD, LF HF and HF/LH ratio. Results of tests were compared between hyperthyroidism patients and matched controls using the non-parametric test of Mann-Whitney. RESULTS: Heart rate was significantly higher in patients with thyrotoxicosis (82.91 ± 10.99 vs 67.04 ± 6.80; 0.006) compared to their controls. On time-domain analysis, there was a trend towards reduction in SDNN (39.52 vs. 63.75; p = 0.2) as well as the RMSSD (30.44 vs 64.03; p = 0.09) in patients with hyperthyroidism. The frequency-domain analysis showed non-significant higher values for the LF (43.87 vs 38.85 ± 12.85; p = 0.8) and lower for the HF (32.54 vs 43.39; p = 0.3). Test's results were mostly impaired in hyperthyroid patients and all patients presented abnormal results for parasympathetic activity. Untreated and recently diagnosed hyperthyroidism is associated to an altered parasympathetic activity in sub Saharan African patients.

Poor glycemic control impacts heart rate variability in patients with type 2 diabetes mellitus: a cross sectional study.

OBJECTIVE: We aimed to determine and compare HRV parameters in poorly and well controlled type 2 diabetes. 54 normotensive type 2 diabetes patients without clinical signs of CAN were enrolled; 29 poorly controlled (HbA1c ≥ 7%) and 25 controls matched for age, sex and BMI. HRV analysis was performed using 24-h ambulatory ECG, with automatic estimation of the time and frequency domain ranges. Comparisons were performed using Mann-Whitney test. RESULTS: We included 54 participants (26 males) aged 56 years [43-62], with known duration of diabetes 3 years [1-7]. HbA1c was 10.1% [9.1-11.9] vs 5.3% [5.1-6.3] (p < 0.001). Blood pressure was 126 mmHg [121-130] vs 124 mmHg [113-133] in the poorly controlled group and the well-controlled group respectively (p = 0.5). 24-h mean heart rate was significantly higher in poorly controlled vs well controlled patients (79 bpm [77-83] vs 75 bpm [69-79], p = 0.006). In the time domain analysis, markers of the overall variability were lower and thus altered in the poorly controlled group (SDNN: 102 ms [90.5-111.1] vs 112.3 ms [104.4-131.2], p = 0.01 and SDANN 88 ms [72.9-99.7] vs 97.8 ms [91.8-114.5], p = 0.01). The frequency domain analysis showed trends towards lower values of sympathovagal balance markers in the poorly controlled group. Reduced HRV is associated with poorly controlled type 2 diabetes mellitus and may be an early marker in clinical practice.

Human herpesvirus 8 infection DNA positivity is associated with low insulin secretion: A case-control study in a sub-Saharan African population with diabetes.

BACKGROUND: Viruses have been considered potential triggers for the development of diabetes. This study assessed insulin secretion and insulin sensitivity in human herpesvirus 8 (HHV8)-infected and uninfected sub-Saharan African people with diabetes. METHODS: In all, 173 people with non-autoimmune diabetes were enrolled consecutively: 124 with type 2 diabetes mellitus (T2DM) and 49 with ketosis-prone diabetes (KPD) admitted in hyperglycemic crisis. Those with KPD were further subdivided into those with new-onset ketotic-phase KPD (n = 34) or non-ketotic phase KPD (n = 15). All participants were screened for HHV8-specific antibodies and genomic DNA. Blood samples were collected for analysis of fasting glucose, HbA1c, lipid profile, and C-peptide, with insulin resistance and secretion estimated by homeostasis model assessment. RESULTS: Among the 173 diabetic participants, 88 (50.9%) were positive for HHV8 antibodies (Ac-HHV8+), including 15 (8.7%) positive for HHV8 DNA (DNA-HHV8+). The seroprevalence of HHV8 was similar between T2DM (55.6%) and KPD (61.2%) subjects. Of those with and without ketotic-phase KPD, 35.3% and 46.7% were Ac-HHV8+, respectively. Body mass index was significantly in lower DNA-HHV8+ than DNA-HHV8- subjects. Low-density lipoprotein and total cholesterol were significantly higher, but C-peptide and homeostatic model assessment of ß-cell function (HOMA-ß) were significantly lower in DNA-HHV8+ than DNA-HHV8- participants. After excluding DNA-HHV8+ participants, triglyceride concentrations were significantly higher in Ac-HHV8+ (n = 73) than Ac-HHV8- (n = 85) subjects. In contrast, HOMA-ß was significantly higher among Ac-HHV8+ than Ac-HHV8- participants. CONCLUSIONS: In the present study, HHV8 DNA positivity was associated with low insulin secretion in this sub-Saharan African diabetes population.

Prevalence, Clinical Presentation, and Factors Associated With Diabetic Foot Ulcer in Two Regional Hospitals in Cameroon.

This study aimed to determine the prevalence of diabetic foot ulcer and high risk for ulceration, describe the clinical presentation, and identify factors associated with diabetic foot ulcer in the Southwest regional hospitals of Cameroon. In this cross-sectional study, data were collected using a structured questionnaire administered to consecutive patients with diabetes. Findings from detailed foot examination were recorded. Diabetic foot ulcer was diagnosed according to the International Working Group on Diabetic Foot (IWGDF) definition. Data were analyzed with Stata IC version 12. Of the 203 participants included, 63.1% were females. Age ranged from 26 to 96 years. The median duration of diabetes was 4.0 years (interquartile range 1.0-8.0 years). The prevalence of diabetic foot ulcer was 11.8% (24), of whom 29.2% (7) had high grade (grades 2 to 4), and most of the ulcers 58.3% (14) were located at the plantar region. The prevalence of high risk for ulceration was 21.8% (39). Loss of protective sensation (OR = 3.73, 95% CI = 1.43-9.71; P = .007), and peripheral arterial disease (OR = 3.48, 95% CI = 1.14-10.56; P = .028) were independently associated with diabetic foot. Diabetic foot ulcer is a common complication among patients with diabetes attending these regional hospitals. Loss of protective sensation, and peripheral arterial disease increase the odds of having diabetic foot ulcer, and we suggest them as the main target of interest for prevention.

Effect of propranolol on heart rate variability in hyperthyroidism.

OBJECTIVES: We aimed to determine the effect of propanolol on heart rate variability (HRV) in hyperthyroidism before antithyroid treatment. This was a before and after study, on ten patients presenting overt hyperthyroidism naïve to treatment. In each patient, a resting electrocardiogram was done followed by estimation of cardiac autonomic dysfunction during five maneuvers (Ewing battery tests). Long term HRV measurement was done using 24 h ambulatory electrocardiographic recording. This automatically provided estimation of HRV using SDNN and RMSSD index, LF, HF, and HF/LF ratio. After baseline investigations, 40 mg of propanolol was given twice a day for 3 days and same parameters were measured after 72 h of treatment. RESULTS: Our patients were aged 40 ± 10 years. Propanolol significantly reduced RR and HR interval (669 ms vs 763 ms and 91 vs 79 bpm; p < 0.01). QT and PR space were significantly extended (360 vs 384 ms and 133 vs 172 ms; p = 0.01). It increases QRS complex and blood pressure response to sustained handgrip but failed to modify previously decreased heart response to deep breathing. HRV parameters such as SDNN, RMSSD, LF, HF and sympathovagal balance estimate by HF/LF ratio remained unchanged. Although a significant reduction in heart excitability, propanolol failed to restore a good sympathovagal balance in hyperthyroidism. Trial registration NCT03393728 "Retrospectively registered".

Effects of nonsurgical periodontal treatment on glycated haemoglobin on type 2 diabetes patients (PARODIA 1 study): a randomized controlled trial in a sub-Saharan Africa population.

BACKGROUND: There is a burglar association between diabetes and periodontitis. Many studies has shown that periodontitis treatment can help improving glycemic control in diabetes patients but little evidence of non-surgical treatment benefit is available in sub Saharan african diabetes patients. We aimed to assess the effects of non-surgical periodontal treatment (NSPT) of chronic periodontitis on glycaemic control in poorly controlled type 2 diabetes patients (T2D) in a sub-Saharan Africa urban setting. METHODS: A total of 34 poorly controlled T2D patients with chronic periodontitis aged 51.4 ± 8.8 years (mean ± SD), with known duration of diabetes of 55.5 ± 42.6 months, and HbA1c of 9.3 ± 1.3% were randomly assigned to two groups. The treatment group (Group 1, n = 17) received immediate ultrasonic scaling, scaling and root planning along with subgingival 10% povidone iodine irrigation, whereas the control group (Group 2, n = 17) was assigned to receive delayed periodontal treatment 3 months later. Pharmacological treatment was unchanged and all participants received the same standardized education session on diabetes management and dental hygiene. The primary outcome was the 3-month change in HbA1c from baseline. Plaque index (PI), gingival bleeding index (GBI), pocket depth (PD), clinical attachment loss (CAL) were also assessed prior to, at 6 and 12 weeks after enrolment. RESULTS: Two subjects in each group were excluded from the study. Data were analyzed on thirty patients (15 per group). Non-surgical periodontal treatment with education for better dental hygiene (group 1) significantly improved all periodontal parameters whereas education only (group 2) improved only the plaque index among all periodontal parameters. Immediate non-surgical periodontal treatment induced a reduction of HbA1c levels by 3.0 ± 2.4 points from 9.7 ± 1.6% at baseline to 6.7 ± 2.0% 3 months after NSPT, (p ˂ 0.001) but the change was not significant in group 2, from mean 8.9 ± 0.9% at baseline vs 8.1 ± 2.6% after 3 months (p = 0.24). CONCLUSION: Non-surgical periodontal treatment markedly improved glycaemic control with an attributable reduction of 2.2 points of HbA1c in poorly controlled T2D patients in a sub Saharan setting. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT02745015 Date of registration: July 17, 2016 'Retrospectively registered'.

Assessment of the agreement between the Framingham and DAD risk equations for estimating cardiovascular risk in adult Africans living with HIV infection: a cross-sectional study.

BACKGROUND: The Absolute cardiovascular disease (CVD) risk evaluation using multivariable CVD risk models is increasingly advocated in people with HIV, in whom existing models remain largely untested. We assessed the agreement between the general population derived Framingham CVD risk equation and the HIV-specific Data collection on Adverse effects of anti-HIV Drugs (DAD) CVD risk equation in HIV-infected adult Cameroonians. METHODS: This cross-sectional study involved 452 HIV infected adults recruited at the HIV day-care unit of the Yaoundé Central Hospital, Cameroon. The 5-year projected CVD risk was estimated for each participant using the DAD and Framingham CVD risk equations. Agreement between estimates from these equations was assessed using the spearman correlation and Cohen's kappa coefficient. RESULTS: The mean age of participants (80% females) was 44.4 ± 9.8 years. Most participants (88.5%) were on antiretroviral treatment with 93.3% of them receiving first-line regimen. The most frequent cardiovascular risk factors were abdominal obesity (43.1%) and dyslipidemia (33.8%). The median estimated 5-year CVD risk was 0.6% (25th-75th percentiles: 0.3-1.3) using the DAD equation and 0.7% (0.2-2.0) with the Framingham equation. The Spearman correlation between the two estimates was 0.93 (p < 0.001). The kappa statistic was 0.61 (95% confident interval: 0.54-0.67) for the agreement between the two equations in classifying participants across risk categories defined as low, moderate, high and very high. CONCLUSION: Most participants had a low-to-moderate estimated CVD risk, with acceptable level of agreement between the general and HIV-specific equations in ranking CVD risk.

Relationship between estimated cardiovascular disease risk and insulin resistance in a black African population living with HIV: a cross-sectional study from Cameroon.

OBJECTIVES: Cardiovascular disease (CVD) and metabolic diseases are growing concerns among patients with HIV infection as a consequence of the improving survival of this population. We aimed to assess the relationship between CVD risk and insulin resistance in a group of black African individuals with HIV infection. METHODS: This cross-sectional study involved patients with HIV infection aged 30-74 years and followed up at the Yaoundé Central Hospital, Cameroon. Absolute CVD risk was calculated using the Framingham and the DAD CVD risk equations while the HOMA-IR index was used to assess insulin resistance (index ≥2.1). RESULTS: A total of 452 patients (361 women; 80%) were screened. The mean age was 44.4 years and most of the respondents were on antiretroviral therapy (88.5%). The median 5-year cardiovascular risk was 0.7% (25th-75th percentiles: 0.2-2.0) and 0.6% (0.3-1.3) according to the Framingham and DAD equations respectively. Of all participants, 47.3% were insulin resistant. The Framingham equation derived absolute CVD risk was significantly associated with insulin resistance; while no linear association was found using the DAD equation. CONCLUSION: The relationship between cardiovascular risk and insulin resistance in black African patients with HIV infection seems to depend on the cardiovascular risk equation used.

The effect of free diabetes care on metabolic control and on health-related quality of life among youths with type 1 diabetes in Cameroon.

OBJECTIVE: To assess the effect of free diabetes care on metabolic control and on health-related quality of life (HRQoL) of youths living with type 1 diabetes in Cameroon. RESEARCH DESIGN AND METHODS: We conducted a clinical audit of a multicenter prospective cohort, performed in three of the nine clinics of the 'Changing Diabetes in Children' (CDiC) project in Cameroon. We collected data on demography, glycemic control, diabetes acute complications, and patients' HRQoL at baseline and after 1 year of follow-up. RESULTS: One hundred and four patients (51 female) were included. The mean age was 16±2 years (min-max: 9-18), the mean duration of diabetes was 5±3 years, and the mean HbA1C level was 11.4%±2.7%. A significant reduction in HbA1c (11.4%±2.7% vs 8.7±2.4%), episodes of severe hypoglycemia (27/104 vs 15/104), and episodes of ketoacidosis (31/104 vs 7/104) were observed after 1 year (p<0.05). We did not observe any significant difference in the total HRQoL score (p=0.66). However, we observed a significant decrease in diabetes-associated symptoms (p<0.05). Age, level of education, duration of diabetes, glycemic control, and the presence or absence of diabetes complications did not significantly affect the total HRQoL score. CONCLUSIONS: One year after free diabetes care offered through the CDiC project, a significant improvement was observed in glycemic control and acute complications of diabetes, but not in the total score of HRQoL of youths living with type 1 diabetes enrolled in the project.

Exercise-induced albuminuria vs circadian variations in blood pressure in type 1 diabetes.

AIM: To investigated the relationship between exercise-induced ambulatory blood pressure measurement (ABPM) abnormalities in type 1 diabetes mellitus (T1DM) adolescents. METHODS: We conducted a case-control at the National Obesity Center of the Yaoundé Central Hospital, Cameroon. We compared 24 h ABPM and urinary albumin-to-creatinine ratio (ACR) at rest and after a standardized treadmill exercise between 20 Cameroonian T1DM patients and 20 matched controls. T1DM adolescents were aged 12-18 years, with diabetes for at least one year, without proteinuria, with normal office blood pressure (BP) and renal function according to the general reference population. Non-diabetic controls were adolescents of general population matched for sex, age and BMI. RESULTS: Mean duration of diabetes was 4.2 ± 2.8 years. The mean 24 h systolic blood pressure (SBP) and diastolic blood pressure (DBP) were respectively 116 ± 9 mmHg in the diabetic group vs 111 ± 8 mmHg in the non-diabetic (P = 0.06), and 69 ± 7 mm Hg vs 66 ± 5 mm Hg (P = 0.19). There was no difference in the diurnal pattern of BP in diabetes patients and non-diabetic controls (SBP: 118 ± 10 mmHg vs 114 ± 10 mmHg, P = 0.11; DBP: 71 ± 7 mmHg vs 68 ± 6 mmHg, P = 0.22). Nighttime BP was higher in the diabetic group with respect to SBP (112 ± 11 mmHg vs 106 ± 7 mmHg, P = 0.06) and to the mean arterial pressure (MAP) (89 ± 9 mmHg vs 81 ± 6 mmHg, P = 0.06). ACR at rest was similar in both groups (5.5 mg/g vs 5.5 mg/g, P = 0.74), but significantly higher in diabetes patients after exercise (10.5 mg/g vs 5.5 mg/g, P = 0.03). SBP was higher in patients having exercise-induced albuminuria (116 ± 10 mmHg vs 108 ± 10 mmHg, P = 0.09). CONCLUSION: Exercise-induced albuminuria could be useful for early diagnosis of kidney damage in adolescents with T1DM.

Atherogenic index of plasma and 10-year risk of cardiovascular disease in adult Africans living with HIV infection: A cross-sectional study from Yaoundé, Cameroon.

BACKGROUND: The paucity of data regarding the association between atherogenic index of plasma and risk of cardiovascular disease in HIV-infected populations living in sub-Saharan Africa prompted us to conduct this study which aimed to assess the relationship between atherogenic index of plasma and risk of cardiovascular disease among a Cameroonian HIV-infected population. METHODS: This was a cross-sectional study conducted among 452 HIV-infected adults in Yaoundé, Cameroon. Risk of cardiovascular disease was calculated using the Framingham risk score; atherogenic index of plasma was derived as log (triglycerides/high-density lipoproteins cholesterol). RESULTS: Participants' mean age (80% females) was 44.4 ± 9.8 years. Atherogenic index of plasma values ranged from -0.63 to 1.36 with a median of 0.11 (25th-75th percentiles: -0.08-0.31). Most participants (88.5%) were on antiretroviral treatment. There was a significant correlation between atherogenic index of plasma and fasting plasma glucose (r = 0.116; p = 0.014), atherogenic index of plasma and total cholesterol (r = -0.164; p < 0.001). Atherogenic index of plasma was significantly associated with the risk of cardiovascular disease either in univariable (ß = 5.05, 95% CI: 3.31-6.79; p < 0.001, R2 = 0.067) or in multivariable linear regression model after adjusting for socio-demographic, clinical and biological confounders (adjusted ß = 3.79, 95% CI: 1.65 - 4.88; p < 0.001, R2 = 0.187). CONCLUSION: Atherogenic index of plasma may be an independent factor impacting the risk of cardiovascular disease among Cameroonian HIV-infected people. More studies are needed to better elucidate the association between atherogenic index of plasma and risk of cardiovascular disease in our setting.

Impact of a pioneer diabetes camp experience on glycemic control among children and adolescents living with type 1 diabetes in sub-Saharan Africa.

BACKGROUND: The metabolic impact of participating in a diabetes camp is little known among children and adolescents living with type 1 diabetes in sub-Saharan Africa. We aimed to assess the changes in glycemic control and insulin doses in a group of children and adolescents living with type 1 diabetes in Cameroon during and after camp attendance. METHODS: During a 5-day camp, we collected data on insulin doses, HbA1c, weight and blood glucose at least six times per day in a group of children and adolescents living with type 1 diabetes. We compared the evolution of these parameters 3 and 12 months after camp. RESULTS: Thirty-two campers completed the study. The mean age was 19 ± 2 years and the median duration of diabetes was 2 [IQR: 1.8-5] years. The mean HbA1c was 7.9 ± 2.2 % and the mean insulin dose was 49 ± 20 units/day upon arrival at camp. HbA1c dropped by 0.6 % after 12 months (p = 0.029). Despite the significant (p = 0.04) reduction in insulin dose from 49 ± 20 to 44 ± 18 units/day at the end of camp, hypoglycemic episodes occurred in 26 campers. However, the mean number of hypoglycemic episodes reduced from 1.32 (range: 0-4) on the first day, to 0.54 (range: 0-2) on the last day of camp (p = 0.006). Weight increased by 6 kg (p = 0.028) between 3 and 12 months after camp, but insulin doses remained unchanged. CONCLUSIONS: Attending camp for children and adolescents living with diabetes is associated with a significant decrease in HbA1c twelve months after camp without changes in insulin doses. Including camps as an integral part of type 1 diabetes management in children and adolescents in sub-Saharan Africa may yield some benefits. TRIAL REGISTRATION: ClinicalTrials.gov NCT02632032 . Registered 4 December 2015.

Study of the effect of altitude on the measurement of glycated haemoglobin using point-of-care instruments.

We measured the glycated haemoglobin (HbA1c) levels of a total of 24 non-diabetic volunteers and diabetic patients using a point-of-care (POC) analyser in three Cameroonian cities at different altitudes. Although 12 to 25% of duplicates had more than 0.5% (8 mmol/mol) difference across the sites, HbA1c values correlated significantly (r = 0.89-0.96). Further calibration studies against gold-standard measures are warranted.

Association of HLA class II markers with autoantibody-negative ketosis-prone atypical diabetes compared to type 2 diabetes in a population of sub-Saharan African patients.

AIM: We investigated the association of HLA DRB1 and DQB1 alleles, haplotypes and genotypes with unprovoked antibody-negative ketosis-prone atypical diabetes (A(-) KPD) in comparison to type 2 diabetes (T2D). METHODS: A(-) KPD and T2D sub-Saharan African patients aged 19-63 years were consecutively recruited. Patients positive for cytoplasmic islet cell, insulin, glutamic acid decarboxylase or islet antigen-2 autoantibodies were excluded. Odds ratios were obtained via logistic regression after considering alleles with a minimum frequency of 5% in the study population. Bonferroni correction was used in the case of multiple comparisons. RESULTS: Among the 130 participants, 35 (27%) were women and 57 (44%) were A(-) KPD. DRB1 and DQB1 allele frequencies were similar for both A(-) KPD and T2D patients; they did not confer any substantial risk even after considering type 1 diabetes susceptibility and resistance alleles. We found no association between A(-) KPD and the derived DRB1*07-DQB1*02:02 (OR: 0.55 [95%CI: 0.17-1.85], P=0.336); DRB1*11-DQB1*03:01 (OR: 2.42 [95%CI: 0.79-7.42], P=0.123); DRB1*15-DQB1*06:02 (OR: 0.87 [95%CI: 0.39-1.95], P=0.731) and DRB1*03:01-DQB1*02:01 (OR: 1.48 [95%CI: 0.55-3.96], P=0.437) haplotypes. Overall, we did not find any evidence of susceptibility to ketosis associated with DRB1 and DQB1 genotypes (all P>0.05) in A(-) KPD compared to T2D. Similar results were obtained after adjusting the analysis for age and sex. CONCLUSION: Factors other than DRB1 and DQB1 genotype could explain the propensity to ketosis in A(-) KPD. These results need to be confirmed in a larger population with the perspective of improving the classification and understanding of the pathophysiology of A(-) KPD.

Blood pressure variables and prevalent electrocardiographic left ventricular hypertrophy in sub-Saharan African individuals with type 2 diabetes.

BACKGROUND: The aim of the present study was to investigate whether brachial blood pressure (BP) variables (systolic BP [SBP], diastolic BP [DBP], pulse [PP] and mean arterial pressure [MAP]) are similar determinants of prevalent electrocardiographic left ventricular hypertrophy (LVH) in sub-Saharan Africans with type 2 diabetes (T2D). METHODS: The study included 420 individuals (49% men) with T2D who were receiving chronic care in two main referral centers in the two major cities (Douala and Yaounde) of Cameroon. Logistic regression models were used to estimate the odds ratio (OR) and 95% confidence intervals (CI) for a standard deviation (SD) higher level of SBP (25 mmHg), DBP (13), PP (18) and MAP (20) with the risk of LVH. Discrimination was assessed and compared with c-statistics and relative integrated discrimination improvement (RIDI; %). RESULTS: The multivariable adjusted OR (95% CI) for prevalent LVH with each SD higher pressure variable was 1.61 (1.22-2.11) for SBP, 1.27 (0.99-1.63) for DBP, 1.62 (1.23-2.15) for PP and 1.44 (1.11-1.87) for MAP. Comparison of c-statistics revealed no difference in the discrimination power of models with each of the BP variables (P > 0.09). However, RIDI showed enhanced discrimination in the models when other BP variables were replaced with PP. However, this enhancement was marginal for SBP. Using BP combinations modestly improved discrimination. CONCLUSIONS: The best predictors of prevalent LVH in the present study population were PP and SBP, whereas DBP was the least effective predictor. These findings have implications for cardiovascular risk stratification and monitoring of risk-reducing therapies.

Admission trends over 8 years for diabetic foot ulceration in a specialized diabetes unit in cameroon.

High rates of foot complications have been reported in people with diabetes in sub-Saharan Africa (SSA). However, there is a paucity of data in support of the changing pattern with time. We report here data on trends in hospitalization for foot ulceration over an 8-year consecutive period in a specialized diabetes unit in SSA. Admission and discharge registers of the diabetes and endocrine unit of the Yaounde Central hospital, Cameroon, were reviewed for the period 2000 through 2007. Data were collected on the status for diabetes, presence of foot ulcer, age, sex, duration of hospitalization, amputation, and deaths.We found that 1841 patients with diabetes were admitted during the study period. The prevalence of foot ulceration was 13% (95% confidence interval [CI] = 11%-15%) and varied significantly by year of study (P = .001). The mean duration of hospitalization significantly decreased with time. Foot ulcer was associated with 115% (95% CI = 87%-148%) more bed use than other conditions in diabetes. Foot ulcer was associated with a nonsignificantly lower risk of death or dropout, with evidence of some attenuation with time. With one exception, the amputation rate of 16% (95% CI = 11%-20%) was similar across years. Foot ulcer is a major cause of hospital admission and bed use for diabetes in Cameroon.