Stata重要命令汇总，
内容包括：
Introduction to STATA & Statistics for critical appraisal

Diagnostic test
- diagti  Report summary statistics for diagnostic tests compared to true disease status
  
- fagoni  Fagan’s Bayesian nomogram

Meta-analysis
- metan  Fixed and random effects meta-analysis

Sample size
- sampsi  Sample size and power determination
- stpower  Sample-size, power, and effect-size determination for survival analysis
- sskdlg  Sample size for the kappa-statistic measure of interrater agreement
- sampclus  Sample Size for Studies with Cluster Sampling