However, it should be noted that 1 or 2 should be specified in spss to indicate truncation.
Kaplan-meier can also estimate the three-year or five-year survival rate, and limit the survival time to three or five years in comparison. ?
Taking three years as an example, the total length of deleted data (expressed as negative values or marked with variables, such as survival status of 2) with a survival time of more than three years is three years.
Extended data:
Kaplan-Meier SPSS analysis results include statistical survival table, and the cumulative survival at that time was cumulative survival rate, from which the corresponding value of 3 years or 5 years was 3/5 years survival rate. If this time point is missing, the first time point that was not missing before will be used.
PFS = progression-free survival rate, that is, progression-free survival rate, including the probability that patients with complete remission will not relapse within a certain period of time and the probability that patients with partial remission or disease without deterioration will not progress within a certain period of time, that is, the disease will not continue to deteriorate. For example, 3-year PFS=60%, that is, after diagnosis, 60% of patients' diseases did not worsen within 3 years after treatment.
OS = overall survival rate, that is, overall survival rate, excluding any restrictions. Whether there is progress or not, as long as the patient is not dead, it is counted in the overall survival rate. For example, within three years, OS=80%, which means that 80% of patients will live within three years after diagnosis.
EFS = event-free survival rate, that is, event-free survival rate, which refers to the probability that no adverse events have occurred since the start of treatment, including change of regimen, side effects, intolerance, disease progression, patient death, etc.
Baidu encyclopedia -PFS (days without progress)