Overexpression of SLPI correlated with different grades ( moderate or good differentiation : @ % low expression versus @ % high expression , low differentiation : @ % low expression versus @ % high expression ) , TNM stage ( I or II : @ % low expression versus @ % high expression ; III or IV : @ % low expression versus @ % high expression ) , lymphatic metastasis ( @ % low expression versus @ % high expression ) and distal metastasis ( @ % low expression versus @ % high expression ) , but not with patient age or sex ( P = @ , P = @ ) .