Objective: The goal of this study was to investigate the association between T2DM and changes in systolic and diastolic blood pressure.

Methods: I randomly selected approximately 1,760 individuals from December 2021 to February 2025. All adult Saudi men and women aged 25–100 who visited Primary health clinics PHCs during the study period are eligible. Diabetic patients with HbA1C levels over 6.4% were cases, while non-diabetic volunteers with less than 5.7% were controls.

Results: Diabetics had a mean systolic blood pressure of 133.76 (mean standard deviation of 17.186), while non-diabetics had a mean systolic blood pressure of 123.32 (mean standard deviation of 17.217). The mean diastolic blood pressure of diabetics was 78.27 (mean standard deviation = 11.478), while that of non-diabetics was 75.71 (mean standard deviation = 12.082).

Conclusions: T2DM prevalence was associated with an increase in mean systolic and diastolic blood pressure. T2DM is prevalent among elderly Saudis with a lower level of education. Systolic and diastolic blood pressures can be useful to identify early-onset or prediabetes in at-risk groups with a family history of T2DM.