Frequencies for first 10,000 rows of prdiag2 variable in nhamcsopd2011 dataset :

             For dx2, is this probable, |
              questionable, or ruleout? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                   No diagnosis entered |      4,855       48.55       48.55
Dx is not probable, questionable, ruleo |      5,057       50.57       99.12
Dx is probable, questionable, or ruleou |         88        0.88      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016