Frequencies for first 10,000 rows of a1c variable in namcs2014 dataset :

    Was blood for HbA1c |
 test drawn at visit or |
 within past 12 months? |      Freq.     Percent        Cum.
------------------------+-----------------------------------
                  Blank |        568        5.68        5.68
N/A, provider not asked |      2,703       27.03       32.71
                    Yes |        884        8.84       41.55
             None found |      5,845       58.45      100.00
------------------------+-----------------------------------
                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017