Nomogram predicting individuals with OLGIM stage III-IV. Each clinical variable has a specific number of points (0–100). The sum of points of each variable was correlated with the probability of OLGIM stage III-IV. The figure presents an example which explains the use of the nomogram. The score of a female participant aged 60–69, with G17 value 1.00–7.98 and PG I value more than 56.51, was 252, which is corresponded to a 5.81 % probability of OLGIM stage III-IV. PG, pepsinogen; G17, gastrin-17.