Frequencies for psi_4_surg_comp_worsestr variable in vwhqi_hosp_ahrq_state dataset :

PSI_4_SURG_CO |
     MP_WORSE |      Freq.     Percent        Cum.
--------------+-----------------------------------
            0 |         20       35.71       35.71
            1 |         13       23.21       58.93
           12 |          1        1.79       60.71
            2 |          5        8.93       69.64
            3 |          2        3.57       73.21
            4 |          5        8.93       82.14
            5 |          4        7.14       89.29
Not Available |          6       10.71      100.00
--------------+-----------------------------------
        Total |         56      100.00

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