Table 5. Number of patients in whom lesions were detecte3 d.

	In %	Frequency	Percent
Overall bubbles	< 25 %	519	67.7
	25–50 %	200	26.1
	50–75 %	38	5.0
	> 75 %	10	1.3
	Total	767	100.0
Overall mucous	< 25 %	545	71.1
	25–50 %	185	24.1
	50–75 %	28	3.7
	> 75 %	9	1.2
	Total	767	100.0
No. lesions identified	0	288	37.5
	1	283	36.9
	2	120	15.6
	3	53	6.9
	4	23	3.0
	Total	767	100.0
Flushing	Suction	64	8.3
	< 50 mL	111	14.5
	> 50 mL	160	20.9
	No Flushing	430	56.1
	Total	765	99.7