a trend toward significancep = 0.09
Multivariate Cox survival analysis confirmed the independent prognostic significance of the PNEN-B versus PNEN-A subgroup classification in carcinoids (HR, 5.86; p = 0.009), while a trend toward significance was observed in SCLC (HR, 1.59; p = 0.09), but not in LCNEC (Table 1 ).