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 |         46        1.01        1.01
No Different than U.S. National Rate |      1,809       39.64       40.64
                       Not Available |      1,677       36.74       77.39
           Number of Cases Too Small |        975       21.36       98.75
       Worse than U.S. National Rate |         57        1.25      100.00
-------------------------------------+-----------------------------------
                               Total |      4,564      100.00

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