Fig. 2From: Predicting cardiorespiratory instabilityHeart rate variability index (HRVI) of step‐down unit patients who were never unstable (blue) and those who would become unstable (gray) at time zero. Times are displayed preceding instability events for the patients wo would become unstable and a similar time frame but at random to hospital stay for a matched cohort of stable step‐down unit patients. CRI: cardiorespiratory instabilityBack to article page