Frequencies for first 10,000 rows of a1c variable in namcs2013 dataset :

    Was blood for HbA1c |
 test drawn at visit or |
 within past 12 months? |      Freq.     Percent        Cum.
------------------------+-----------------------------------
                  Blank |        682        6.82        6.82
N/A, provider not asked |      2,741       27.41       34.23
                    Yes |        855        8.55       42.78
             None found |      5,722       57.22      100.00
------------------------+-----------------------------------
                  Total |     10,000      100.00

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