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Short-range cardiorespiratory synchronization strength (λ) (mean and 95% CI) preceding (pre-event) and following (post-event) sigh-P/sigh-CA of 15 healthy infants at 2 weeks, 3 months, and 6 months old. (A) 2 weeks, (B) 3 months, and (C) 6 months. Each analysis window contained 10 breaths with 50% overlap between windows. *Significant difference between pre- and post- sigh-P, †significant difference between pre- and post- sigh-CA.
