Frequencies for psi_6_iat_ptxstr variable in vwhqi_hosp_ahrq dataset :

                       PSI_6_IAT_PTX |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
      Better than U.S. National Rate |          2        0.04        0.04
No Different than U.S. National Rate |      3,218       71.23       71.27
                       Not Available |      1,185       26.23       97.50
           Number of Cases Too Small |         18        0.40       97.90
       Worse than U.S. National Rate |         95        2.10      100.00
-------------------------------------+-----------------------------------
                               Total |      4,518      100.00

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