SPARCL1 and neoplasm: By incorporating these factors, except the highly collinear variables, into the Cox multivariate regression proportional hazards model, we found that radical degree (HR 7.266, 95% CI 1.222~ 43.221; P = 0.029), tumor size (HR 4.518, 95% CI 1.172~ 17.410; P = 0.028), and SPARCL1 expression (HR 0.157, 95% CI 0.040~ 0.612; P = 0.008) were independent prognostic predictors in gastric GIST (Table 5).