Table 1

Values of mouth whistle pressure (P_mo,W), oesophagus whistle pressure (P_oes,W), and gastric whistle pressure (P_ga,W) during whistles ranging from minimal to maximal intensity performed by 8 healthy subjects

Subject	Whistles	P_mo,W (cmH₂O)	P_oes,W (cmH₂O)	P_ga,W (cmH₂O)	P_mo,W/P_oes,W	P_mo,W/P_ga,W	r P_mo,W versus P_oes,W	r P_mo,W versus P_ga,W
1	42	13–151	11–145	15–177	1.01 (0.08)	0.92 (0.08)	0.997	0.993
2	52	11–153	12–138	13–147	1.07 (0.07)	1.03 (0.06)	0.998	0.997
3	44	18–177	18–115	22–196	1.15 (0.20)	0.83 (0.07)	0.984	0.998
4	41	20–159	20–161	19–178	0.96 (0.05)	0.76 (0.12)	0.997	0.971
5	35	7–117	4–119	6–134	1.09 (0.19)	0.87 (0.10)	0.999	0.998
6	22	23–96	20–99	50–179	1.09 (0.08)	0.51 (0.06)	0.989	0.964
7	20	34–152	20–87	40–182	1.82 (0.39)	0.90 (0.12)	0.864	0.986
8	23	31–114	26–104	32–117	1.09 (0.07)	0.98 (0.07)	0.983	0.986
All	278	7–222	4–161	9–235	1.12 (0.25)	0.87 (0.16	0.929	0.936

Pressure data are given as ranges and ratios as mean±sd. r: correlation coefficient.