Table 1. Outcomes for the number of treatments required to close a tympanic membrane (TM) and grade of TMP.

Three patients with incomplete tympanic membrane perforation (TMP) closure after the first surgery declined additional surgery. One patient with incomplete TMP closure after the second surgery refused further surgery. In two patients, the gelatin sponge had disappeared one week after both the first and second surgeries, resulting in the discontinuation of subsequent surgeries.

Number of treatments	Size of perforation
	Grade I (n = 30)	Grade II (n = 11)	Grade III (n = 3)	Total (n = 45)
One treatment	23/30	8/11	1/3	32/44 (72.7%)
Second treatment	3/30 (4 surgeries; 3 quitted)	2/11 (3 surgeries)	0/3 (2 surgeries)	5/44 (11.4%) (3 quitted)
Third treatment	0/30 (no surgeries; 1 quitted)	0/11 (no surgeries; 1 quitted)	0/3 (1 surgery; 1 quitted)	0/44 (0.0%) (3 quitted)
Fourth treatment	0/30 (no surgeries)	0/11 (no surgeries)	0/3 (1 surgery)	0/44 (0.0%) (no quitted)
Closure rates	26/30 (86.7%)	10/11 (90.9%)	1/3 (33.3%)	37/44 (84.1%) (6 quitted)