Metabolically Healthy/Unhealthy Overweight/Obesity Associations With Incident Heart Failure in Postmenopausal Women

Background: Obesity is associated with an increased risk of heart failure (HF); however, how metabolic weight groups relate to HF risk, especially in postmenopausal women, has not been demonstrated. Methods: We included 19 412 postmenopausal women ages 50 to 79 without cardiovascular disease from the Women’s Health Initiative. Normal weight was defined as a body mass index ≥18.5 and <25 kg/m 2 and waist circumference <88 cm and overweight/obesity as a body mass index ≥25 kg/m 2 or waist circumference ≥88 cm. Metabolically healthy was based on <2 and unhealthy ≥2 cardiometabolic traits: triglycerides ≥150 mg/dL, systolic blood pressure ≥130 mm Hg or diastolic blood pressure ≥85 mm Hg or blood pressure medication, fasting glucose ≥100 mg/dL or diabetes medication, and HDL-C (high-density lipoprotein cholesterol) <50 mg/dL. Risk factor-adjusted Cox regression examined the hazard ratios (HRs) for incident hospitalized HF among metabolically healthy normal weight (reference), metabolically unhealthy normal weight, metabolically healthy overweight/obese, and metabolically unhealthy overweight/obese. Results: Among our sample, 455 (2.34%) participants experienced HF hospitalizations over a mean follow-up time of 11.3±1.1 years. Compared with metabolically healthy normal weight individuals, HF risk was greater in metabolically unhealthy normal weight (HR, 1.66 [95% CI, 1.01–2.72], P =0.045) and metabolically unhealthy overweight/obese individuals (HR, 1.95 [95% CI, 1.35–2.80], P =0.0004), but not metabolically healthy overweight/obese individuals (HR, 1.15 [95% CI, 0.78–1.71], P =0.48). Subdividing the overweight/obese into separate groups showed HRs for metabolically unhealthy obese of 2.62 (95% CI, 1.80–3.83; P <0.0001) and metabolically healthy obese of 1.52 (95% CI, 0.98–2.35; P =0.06). Conclusions: Metabolically unhealthy overweight/obese and metabolically unhealthy normal weight are associated with an increased risk of HF in postmenopausal women.