Withings Hypertension Notification Retrospective Study (HTNF)

Inclusion Criteria:

• Users of commercially purchased, consumer-grade Withings smart scales (models Body Cardio, Body Comp, Body Scan) in a standard home environment
• Concurrent ground-truth blood pressure data collected via Withings connected blood pressure monitors (BPM, BPM+, BPM Connect, or BPM Core)
• At least 7 blood pressure measurements within a given week to establish reliable weekly hypertension status classification
• Age >= 18 years (all regions) or >= 22 years (United States), consistent with the predicate device age requirement
• Receipt of the study information letter without exercising the right to opt out (for applicable regulatory jurisdictions)

Exclusion Criteria:

• Users lacking valid weekly average systolic and diastolic blood pressure measurements (missing ground truth)
• Users with physiological measurements falling outside plausible clinical ranges (BMI < 10 or > 100 kg/m2, age < 18/22 or > 100 years)
• Users who exercised their right to opt out of the retrospective study
• Users without an individual Withings account (shared accounts are excluded to prevent data contamination)