Impact of COVID-19 pandemic on glycaemic and blood pressure control among patients with type 2 diabetes in primary care in Hong Kong.

Objectives: To evaluate the impact of social distancing measures due to COVID-19 pandemic on glycemic and blood pressure control in primary care in Hong Kong.

Methods: This was a retrospective cross-sectional study. Diabetic patients with regular follow-up in 8 public primary care clinics in Hong Kong within the study period were recruited. The outcomes were to detect any difference of HbA1c levels and BP between pre-pandemic group (2019 group) and the 1-year post-pandemic group (2020 group) in all patients and in sub-group analysis of different age groups, sex, body mass index, presence of diabetic complications and different diabetic treatment.

Results: There was no statistically significant change in HbA1c level between 2020 and 2019 groups which was 0.019% (95% confidence interval [CI] -0.057% to 0.094%, p = 0.632). There was also no statistically significant change in both systolic and diastolic BP between 2020 and 2019 groups which were -0.143 mmHg (95%CI -1.005 mmHg to 0.719 mmHg, p = 0.745) and 0.148 mmHg (95%CI -0.422 mmHg to 0.718 mmHg, p = 0.611). Subgroup analysis showed that female gender had statistically significant improvement in glycaemic control (HbA1c 6.92% in 2020 group versus HbA1c 7.03% in 2019 group, p = 0.021). Patients with diabetic retinopathy had statistically significant lower diastolic BP (diastolic BP 73 mmHg in 2020 group versus diastolic BP 75 mmHg in 2019 group with p = 0.011).

Conclusions: Despite the implementation of various social distancing measures resulting in significant change in lifestyle, COVID-19 pandemic did not worsen glycaemic and blood pressure control in T2DM patients. In fact, slight improvement in glycaemic control among female patients was found.

Trial registration: Not applicable.