Table 1. The proportion of the c-Kit positive area in the corpus of four different aged rat stomach (all, n = 6).

	6 week	31 week	74 week	2 year	P-value
The proportion of c-Kit in SMB (%)	1.65 ± 1.26	0.9 ± 0.78	0.80 ± 0.51	0.83 ± 0.50	0.008
The proportion of c-Kit in CM (%)	0.14 ± 0.09	0.19 ± 0.15	0.19 ± 0.10	0.18 ± 0.11	0.524
The proportion of c-Kit in MP (%)	2.04 ± 1.51	1.55 ± 0.93	0.83 ± 0.49	0.30 ± 0.25	< 0.001
The proportion of c-Kit in LM (%)	0.15 ± 0.12	0.23 ± 0.15	0.33 ± 0.24	0.17 ± 0.16	0.054
Total density of c-Kit (%)	1.05 ± 1.31	0.70 ± 0.81	0.54 ± 0.46	0.37 ± 0.40	< 0.001

The data are expressed as mean ± SD or n (%), as appropriate. The groups were compared in terms of ANOVA with post-hoc Tukey HSD in different aged rat group. SMB, submucosal border; CM, circular muscle; MP, myenteric plexus; LM, longitudinal muscle.