GSE15459 cohort (tumour, n = 200) in the Gene Expression Omnibus (GEO) was utilized to perform the prognostic analyses of ARLs in GC patients (https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE34942). LASSO Cox regression analysis was conducted using the 'glmnet R package. Tuning parameter (λ) selection in the LASSO model used 10‐fold cross‐validation via minimum criteria. A λ value of 0.0379 was chosen (λ.min) according to 10‐fold cross‐validation.

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