Frequencies for psi_4_surg_comp variable in vwhqi_hosp_ahrq dataset :

                     PSI_4_SURG_COMP |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                                     |        159        3.29        3.29
      Better than U.S. National Rate |         63        1.30        4.60
No Different than U.S. National Rate |      1,861       38.53       43.13
                       Not Available |      1,773       36.71       79.83
           Number of Cases Too Small |        894       18.51       98.34
       Worse than U.S. National Rate |         80        1.66      100.00
-------------------------------------+-----------------------------------
                               Total |      4,830      100.00

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