Quantitative evidence of the differences between cardio-respiratory coordination (CRC) and phase synchronisation (PS).

The table shows the total number of respiratory cycles in the considered situations of respiration and sleep stages. The symbols † and * indicate significant proportional increases and decreases, respectively, in and after apneic and hypopneic events (AHE) in comparison to normal breaths (2×2 contingency tables, χ2-test, significance level α = 0.05 with Bonferroni correction.).