Table 3.

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

	Control1 Min–Max (median) Mean ± SD	Papaverine2 Min–Max (median) Mean ± SD	Piracetam3 Min–Max (median) Mean ± SD	P a	P b
OHC
Day 3	165–189 (175.5)	141–159 (148.5)	90–132 (109.5)	0.001**	1,2 0.007**
	177.00 ± 7.32	148.90 ± 4.93	109.90 ± 13.75		1,3 0.001** 2,3 0.001**
Day 7	129–144 (135)	114–138 (122)	101–123 (115.5)	0.001**	1,2 0.001**
	136.00 ± 4.67	123.00 ± 6.67	114.90 ± 6.56		1,3 0.001** 2,3 0.015*
Day 14	93–120 (106.5)	72–91 (82.5)	104–120 (111)	0.001**	1,2 0.001**
	106.80 ± 7.57	81.90 ± 6.54	104.50 ± 4.60		1,30.403 2,3 0.001**
IHC
Day 3	34–39 (36.5)	25–31 (28)	17–26 (20.5)	0.001**	1,2 0.001**
	36.50 ± 1.58	28.10 ± 1.91	20.70 ± 3.27		1,3 0.001** 2,3 0.001**
Day 7	23–28 (25.5)	20–27 (23.5)	19–24 (21.5)	0.001**	1,2 0.036*
	25.60 ± 1.71	23.50 ± 2.17	21.50 ± 1.58		1–3 0.001** 2,3 0.039*
Day 14	18–24 (21)	15–24 (17.5)	16–30 (22.5)	0.005**	1,2 0.004**
	21.00 ± 2.05	17.80 ± 1.93	20.70 ± 1.94		1,30.818 2,3 0.005**

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