Background: The STEP (Strategy of Blood Pressure Intervention in the Elderly Hypertensive Patients) trial reported the cardiovascular benefit of intensive blood pressure (BP) control. The objective of this analysis was to evaluate the effect of intensive BP lowering on the new-onset diabetes incidence.
Methods: The patients of STEP who had a baseline fasting serum glucose (FSG) <7.0 mmol/L without diabetes history and hypoglycemic medication use were included in the main analysis. The primary outcome was the new-onset diabetes, defined as the time to first occurrence of a FSG ≥7.0 mmol/l. The secondary outcome was the new-onset impaired fasting glucose (IFG: FSG 5.6-6.9 mmol/l) among patients with normoglycemia. The competing risk proportional hazards regression model was used in the main analysis.
Results: Over a median follow-up of 3.42 years, 273 (9.6%) in the intensive group and 262 (9.5%) in the standard group developed new-onset diabetes (adjusted HR 1.03; 95% CI 0.87-1.22) . The adjusted hazard ratio for the secondary outcome was 1.05 (95% CI 0.92-1.19) . The mean of the highest FSG was 5.82 mmol/l for intensive group and 5.84 mmol/l for standard group. The sensitivity analyses showed no significant difference with respect to the effect of the treatment arms.
Conclusions: Intensive BP lowering (target, 110 to <130 mmHg) , as compared with standard BP lowering (target, 130 to <150 mmHg) , did not increase the risk of new-onset diabetes and IFG in patients with hypertension.
R. Yang: None. J. Cai: None.