Table 4. Criteria for the inclusion of prognostic miRNA studies.

Study design	Prospective or retrospective cohort design with an appropriate study population
Tumor type	Osteosarcoma
Assay type	Tissue or blood
MiRNA measure	Quantitative real time reverse transcription PCR
Survival measure	OS or RFS or DFS or MFS
Analysis	Reporting of the HRs including 95% CIs or Kaplan Meier survival curves
Follow-up time	Any
Language	English or Chinese

OS: overall survival; DFS: disease-specific survival; RFS: recurrence-free survival; MFS: metastasis-free survival.