Frequencies for first 10,000 rows of a1cres variable in namcs2010 dataset :

 most recent result for |
        glycohemoglobin |
               (hgba1c) |      Freq.     Percent        Cum.
------------------------+-----------------------------------
                  blank |     10,000      100.00      100.00
------------------------+-----------------------------------
                  Total |     10,000      100.00

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