Completeness of variables in Hospital-Based Cancer Registries for prostatic malignant neoplasm.

to analyze the completeness of variables from Hospital-Based Cancer Registries of cases of prostate neoplasm in the Oncology Care Network of a Brazilian state between 2000 and 2020. an ecological time series study, based on secondary data on prostate cancer Hospital-Based Cancer Registries prostate. Data incompleteness was classified as excellent (<5%), good (between 5%-10%), fair (10%-20%), poor (20%-50%) and very poor (>50%), according to the percentage of lack of information. there were 13,519 cases of prostate cancer in the Hospital-Based Cancer Registries analyzed. The variables "family history of cancer" (p<0.001), "alcoholism" (p<0.001), "smoking" (p<0.001), "TNM staging" (p<0.001) had a decreasing trend, while "clinical start of treatment" (p<0.001), "origin" (p=0.008) and "occupation" (p<0.001) indicated an increasing trend. most Hospital-Based Cancer Registries variables showed excellent completeness, but important variables had high percentages of incompleteness, such as TNM and clinical staging, in addition to alcoholism and smoking.