Summary statistics for ther2013q1 dataset :

by Jean Roth , jroth@nber.org , 7 Apr 2017

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    282,362    9.31e+07    4.62e+07   3.04e+07   8.93e+08
      caseid |    282,362     9000169    344102.8    3037529    9819975
dsg_drug_seq |    282,362    3.809826    7.486139          1        171
    start_dt |    268,227    1.43e+07     9095166       1011   2.92e+07
start_dt_num |    268,220    18565.02    3004.339    -349034     350485
-------------+---------------------------------------------------------
      end_dt |    125,264    1.58e+07     8217145       1970   2.91e+07
  end_dt_num |    125,257     18920.9    1847.762    -279832     384493
         dur |      2,337    65.59991    435.9118          1       7300
      durstr |          0
     dur_cod |          0

by Jean Roth , jroth@nber.org , 7 Apr 2017