TABLE 4.

Change in middle ear function assessments from baseline to 6-week in randomized participants with abnormal baseline assessments

Status	Balloon Dilation	Control	Between Arm P Value
Tympanic membrane position
Improved	66.7% (10/15)	0.0% (0/12)	<0.001a
Not improved	33.3% (5/15)	100% (12/12)
Within arm p valueb	0.002	–
Valsalva maneuver
Improved	47.1% (8/17)	14.3% (2/14)	0.068a
Not improved	52.9% (9/17)	85.7% (12/14)
Within arm p valueb	0.005	0.157
Tympanogram type
Improved	57.1% (8/14)	10.0% (1/10)	0.006c
No change	42.9% (6/14)	60.0% (6/10)
Worsened	0.0% (0/14)	30.0% (3/10)
Within arm p valued	0.008	0.625

Results are presented as % (n/N). Tympanic membrane position improvement is defined as a change from retracted at baseline to normal at follow-up; N is participant. Valsalva maneuver improvement is defined as a change from a negative to a positive result; N is participant. Tympanogram type improvement is defined as a change from type B at baseline to type A or C at follow-up, or a Type C at baseline to a type A at follow-up; N is Eustachian tube.

^aP values are based on the two-sided, two-sample Fisher's exact test for the difference between randomized arms at 6-week follow-up.

^bP values are based on the two-sided, paired sample McNemar's test for the difference within each randomized arm.

^cP value is based on the CMH χ² test (row mean scores) for differences between randomized arms.

^dP values are based on the Wilcoxon signed-rank test for differences within each randomized arm.