showed a trendP =0.05
Fisher exact test was used to identify any differences between the two subgroups of patients with and without loco-regional recurrences, stratified by the main clinicopathological characteristics: it showed a trend towards a significant difference in the patients' distribution by lymph node status (pN+ vs. cN0 or pN0) ( P =0.05), but not by pT ( P =0.40), stage ( P =1.0), or grade ( P =0.14).