Purpose: To evaluate how self-care maintenance, self-care monitoring, and self-care management affect glycated haemoglobin in type 2 diabetes mellitus patients and to set cut-off points of the Self-Care of Diabetes Inventory scales using glycated haemoglobin as outcome of interest.
Methods: A secondary analysis of a previous multicentre observational cross-sectional study was conducted. Overall, 540 adults with type 2 diabetes mellitus confirmed diagnosis were involved. Socio-demographic and clinical data were collected. Self-care maintenance, self-care monitoring, and self-care management were measured by the Self-Care of Diabetes Inventory. Linear regression models were performed to assess the relationship between self-care maintenance, self-care monitoring, and self-care management and glycated haemoglobin. Receiver operating characteristics curves were carried out to identify the best cut-off score for each self-care scale considering glycated haemoglobin >7% as outcome of interest.
Results: Self-care monitoring and self-care management were associated to glycated haemoglobin in both patients without (self-care monitoring p = 0.0008; self-care management p = 0.0178) and with insulin therapy (self-care monitoring p = 0.0007; self-care management p = 0.0224). Self-care maintenance was associated to glycated haemoglobin in patients without insulin therapy (p = 0.0118). Cut-off scores providing the best performance were 70 points for self-care maintenance and self-care monitoring, and 60 points for self-care management.
Conclusions: Self-care maintenance, self-care monitoring, and self-care management differently affect glycated haemoglobin in patients with type 2 diabetes mellitus. Clinicians could implement tailored interventions to improve glycaemic control considering the lacking area of self-care.
Keywords: Diabetes Mellitus; Glycated haemoglobin; HbA1c; Self-care; Self-management; Type 2 Diabetes Mellitus.