Frequencies for psi_4_surg_compstr variable in vwhqi_hosp_ahrq dataset :

                     PSI_4_SURG_COMP |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
      Better than U.S. National Rate |         63        1.37        1.37
No Different than U.S. National Rate |      1,866       40.62       41.99
                       Not Available |      1,669       36.33       78.32
           Number of Cases Too Small |        916       19.94       98.26
       Worse than U.S. National Rate |         80        1.74      100.00
-------------------------------------+-----------------------------------
                               Total |      4,594      100.00

by Jean Roth , jroth@nber.org , 16 Nov 2016