Prevalence and correlates of inadequate glycaemic control: results from a nationwide survey in 6,671 adults with diabetes in Brazil

Ana Beatriz Valverde Mendes, João Antônio Saraiva Fittipaldi, Raimundo Celestino Silva Neves, Antônio Roberto Chacra, Edson Duarte Moreira Jr, Ana Beatriz Valverde Mendes, João Antônio Saraiva Fittipaldi, Raimundo Celestino Silva Neves, Antônio Roberto Chacra, Edson Duarte Moreira Jr

Abstract

Diabetes is a significant public health burden on the basis of its increased incidence, morbidity, and mortality. This study aimed to estimate the prevalence of inadequate glycaemic control and its correlates in a large multicentre survey of Brazilian patients with diabetes. A cross-sectional study was conducted in a consecutive sample of patients aged 18 years or older with either type 1 or type 2 diabetes, attending health centres located in ten large cities in Brazil (response rate = 84%). Information about diabetes, current medications, complications, diet, and satisfaction with treatment were obtained by trained interviewers, using a standardized questionnaire. Glycated haemoglobin (HbA(1c)) was measured by high-performance liquid chromatography in a central laboratory. Patients with HbA(1c) > or = 7 were considered to have inadequate glycaemic control. Overall 6,701 patients were surveyed, 979 (15%) with type 1 and 5,692 (85%) with type 2 diabetes. The prevalence of inadequate glycaemic control was 76%. Poor glycaemic control was more common in patients with type 1 diabetes (90%) than in those with type 2 (73%), P < 0.001. Characteristics significantly associated with improved glycaemic control included: fewer years of diabetes duration, multi professional care, participation in a diabetes health education program, and satisfaction with current diabetes treatment. Despite increased awareness of the benefits of tight glycaemic control, we found that few diabetic patients in Brazil met recommended glycaemic control targets. This may contribute to increased rates of diabetic complications, which may impact health care costs. Our data support the public health message of implementation of early, aggressive management of diabetes.

Figures

Fig. 1
Fig. 1
Relationship between self-reported global satisfaction with diabetes treatment and distribution of HbA1c values, according to diabetes type, Brazil, 2006

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