Frequencies for ins_art_openings_pressure_ulcer variable in hcccoefn dataset :

ins_art_ope |
nings_press |
  ure_ulcer |      Freq.     Percent        Cum.
------------+-----------------------------------
       .331 |          1      100.00      100.00
------------+-----------------------------------
      Total |          1      100.00

by Jean Roth , jroth@nber.org , 8 Feb 2018