Frequencies for psi_12_postop_pulmemb_dvt_tostr variable in vwhqi_hosp_ahrq_state dataset :

PSI_12_POST |
OP_PULMEMB_ |
 DVT_TOOFEW |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         18       32.14       32.14
          1 |         13       23.21       55.36
         10 |          1        1.79       57.14
         12 |          1        1.79       58.93
          2 |          7       12.50       71.43
         22 |          1        1.79       73.21
          3 |          1        1.79       75.00
          4 |          1        1.79       76.79
          5 |          1        1.79       78.57
          6 |          2        3.57       82.14
          7 |          1        1.79       83.93
          8 |          2        3.57       87.50
          9 |          1        1.79       89.29
        N/A |          6       10.71      100.00
------------+-----------------------------------
      Total |         56      100.00

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