ERBB2 and adenocarcinoma: In addition, positive correlations between five-year mortality and HER2-positive squamous cell carcinoma (OR 2.88, 95 % CI 1.34–6.17; P = 0.006) and adenocarcinoma (OR 1.91, 95 % CI 1.15–3.17; P = 0.01) were found.