Table 4.

Comparison of mean amount of apoptotic OHCs and IHCs identified using TUNEL method on the 3^rd, 7^th and 14^th days

	Control1 Min–Max (median) Mean ± SD	Papaverine2 Min–Max (median) Mean ± SD	Piracetam3Min–Max (median) Mean ± SD	P a	P b
OHC
Day 3	8–13 (10.5)	7–10 (8.5)	4–7 (5.5)	0.001**	1,2 0.007**
	10.60 ± 1.51	8.60 ± 1.17	5.60 ± 0.97		1,3 0.001** 2,3 0.001**
Day 7	8–11 (10)	4–10 (7.5)	4–12 (7.5)	0.004**	1,2 0.001**
	9.70 ± 0.95	7.20 ± 1.62	7.80 ± 2.20		1,3 0.019* 2,30.588
Day 14	7–11 (9)	4–7 (5.5)	6–10 (9)	0.001**	1,2 0.001*
	9.00 ± 1.15	5.60 ± 0.97	8.50 ± 1.27		1,30.454 2,3 0.001*
IHC
Day 3	1–3 (1.5)	1–2 (1)	0–1 (1)	0.011*	1,2 0.049*
	1.70 ± 0.82	1.10 ± 0.32	0.90 ± 0.32		1,3 0.010** 2,30.168
Day 7	1–3 (2)	1–2 (1)	1–2 (1)	0.187
	1.80 ± 0.79	1.30 ± 0.48	1.30 ± 0.48
Day 14	1–3 (1)	0–1 (1)	1–3 (1)	0.023*	1,2 0.015*
	1.60 ± 0.84	0.80 ± 0.42	1.50 ± 0.71		1,30.863 2,3 0.015*

^aKruskal–Wallis test. ^bMann–Whitney U test. *P < 0.05. **P < 0.01.