Contains data from aki_sim.dta
  obs:        36,000                          Simulated AKI marker data (see
                                                -notes-)
 vars:             6                          14 Feb 2008 14:17
 size:       828,000 (94.7% of memory free)   (_dta has notes)
-------------------------------------------------------------------------------
              storage  display     value
variable name   type   format      label      variable label
-------------------------------------------------------------------------------
id              int    %8.0g                  subject identification
y               float  %9.0g                  marker value
s               float  %9.0g                * marker measurement time (days)
tevent          float  %9.0g                * time from measurement to event
                                                (days)
statusall       byte   %13.0g      statusall
                                            * event status
tmfull          float  %9.0g                  
                                            * indicated variables have notes
-------------------------------------------------------------------------------
Sorted by:  

**********************
value labels for variables with numeric codes:

statusall:
           0 controls
           1 severe AKI
           2 mild AKI
           9 non-AKI death

*********************
notes:

_dta:
  1.  simulated biomarker data for detection of acute kidney injury (AKI) during
      major cardiac surgery
  2.  reference - Pepe M, Zheng Y, Jin Y.  Evaluating the ROC performance of
      markers for future events.  UW Biostatistics Working Paper Series no. 313.
      University of Washington. 2007.
  3.  see Appendix B of reference for simulation description.
  4.  (GML note - see ~\d\mp\dabs_data\aki_jin\aki_init.do)

s:
  1.  marker measurement time with respect to surgery

tevent:
  1.  time from marker measurement to AKI event
  2.  valid only for statusall = 1,2,9.

statusall:
  1.  controls = no AKI after surgery