Frequencies for psi_11_postop_respfail_worsestr variable in vwhqi_hosp_ahrq_state dataset :

PSI_11_POSTOP |
_RESPFAIL_WOR |
           SE |      Freq.     Percent        Cum.
--------------+-----------------------------------
            0 |         12       21.43       21.43
            1 |          8       14.29       35.71
           10 |          1        1.79       37.50
           11 |          3        5.36       42.86
           12 |          1        1.79       44.64
           13 |          2        3.57       48.21
           14 |          1        1.79       50.00
           15 |          1        1.79       51.79
           19 |          1        1.79       53.57
            2 |          4        7.14       60.71
           20 |          1        1.79       62.50
           21 |          1        1.79       64.29
            3 |          4        7.14       71.43
            4 |          5        8.93       80.36
            5 |          2        3.57       83.93
            6 |          1        1.79       85.71
            8 |          1        1.79       87.50
            9 |          1        1.79       89.29
Not Available |          6       10.71      100.00
--------------+-----------------------------------
        Total |         56      100.00

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