marginally significantP = 0.056
The χ 2 test indicated that the staining score of HPSE protein was significantly correlated with tumor grade ( P = 0.012, Table 2 ), and that the correlation between HPSE protein expression and recurrence status was marginally significant as well ( P = 0.056, Table 2 ), which suggests that HPSE expression might be significantly correlated with recurrence if the sample size was big enough.