Summary statistics for icd9sg2013 dataset :

by Jean Roth , jroth@nber.org , 27 Apr 2017

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     prcdrcd |          0
    longdesc |          0
   shortdesc |          0
     version |      3,878          30           0         30         30
       fyear |      3,878        2013           0       2013       2013

by Jean Roth , jroth@nber.org , 27 Apr 2017