Other statistical analyses
osteosarcoma, death
OSTEOSARCOMA
Baseline clinical characteristics of all pediatric and young adulthood osteosarcoma patients were described as frequencies and compared by Pearson’s chi-square test. The cancer-specific survival (CSS) was assessed by the Kaplan-Meier method and the log-rank test. Multivariate Cox analysis was performed to determine the prognostic factors associated with CSS. The CSS was defined as the time from diagnosis of osteosarcoma to the death because of osteosarcoma. Cases died of other reasons or unknown reasons or alive were regarded as censored. The last follow-up time was 31 Dec, 2019. Two-sided 