highly significantP< 0.001
From analysis of variance F (2,59) was found to be 31.65 which is highly significant (P< 0.001) showing that the three groups viz normal (15.4 + 2.6 ng ml 1), CSG (109.8 + 17.7 ng ml- 1) and carcinoma of stomach (367 + 55.5 ng ml- 1) differ significantly.