Frequencies for first 10,000 rows of a1c variable in namcs2012 dataset :

    Was blood for HbA1c |
 test drawn at visit or |
 within past 12 months? |      Freq.     Percent        Cum.
------------------------+-----------------------------------
                  Blank |        721        7.21        7.21
N/A, provider not asked |      2,900       29.00       36.21
                    Yes |        725        7.25       43.46
             None found |      5,654       56.54      100.00
------------------------+-----------------------------------
                  Total |     10,000      100.00

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