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What is heart rate variability (HRV)?

Oura reports that heart rate variability (HRV) measures the variation in heartbeat timing, reflecting stress levels and recovery. Higher HRV indicates well-being, while lower HRV signals stress.
ascopubs.org

Measuring variation in the quality of systemic anti-cancer therapy delivery across hospitals: A national population-based evaluation.

Real-world behavioral restrictional practices of cancer patients (pts). This is an ASCO Meeting Abstract from the 2023 ASCO Annual Meeting I. This abstract does not include a full text component.
The American Journal of Managed Care

Clinical Process Variation: Effect on Quality and Cost of Care

Wide variation in the way clinical services are provided to similar patients for similar visit types results in highly variable costs but similar clinical outcomes. Objective: To identify optimal ...
insider.si.edu

Measuring Quasar Variability with Pan-STARRS1 and SDSS

https://urldefense.proofpoint.com/v1/url?u=http://adsabs.harvard.edu/abs/2014ApJ...784...92M&k=di ZKtJPqj4jWksRIF4bjkw%3D%3D%0A&r ...