Table 6. The calculations for time intervals (a) between a P_io plateau onset and a P_io onset (T_PP) and (b) between airflow peak and the offset of a P_io plateau (T_PPFW), (c) duration of a P_io plateau (T_PPD), (d) P_io peak (P_P) and (e) airflow resistance (i) at the onset of a P_io plateau (R_PPON), (ii) at the offset of a P_io plateau (R_PPOFF) and (iii) at airflow peak (R_FWP).

(a) TPP = time at a Pio plateau onset (tPPON) – time at a Pio onset (tPON)

(b) TPPFW = time at airflow peak (tFWP) – time at a Pio plateau offset (tPPOFF)

(c) TPPD = time at a Pio plateau offset (tPPOFF) – time at a Pio plateau onset (tPPON)

(d) PP = the highest Pio (PH) – Pio at a Pio onset (tPON)

(e) i. airflow resistance at a Pio plateau onset (RPPON)

= Pio at tPPON – Pio at tPON /airflow at tPPON

ii. airflow resistance at a Pio plateau offset (RPPOFF)

= Pio at tPPOFF – Pio at tPON /airflow at tPPOFF

iii. airflow resistance at airflow peak (RFWP)

= Pio at tFWP – Pio at tPON /airflow at tFWP