Frequencies for first 10,000 rows of fbg variable in namcs2011 dataset :

   Was fasting blood glucose (FBG) |
  drawn within 12 months of visit? |      Freq.     Percent        Cum.
-----------------------------------+-----------------------------------
                             Blank |      1,570       15.70       15.70
Not applicable, provider not asked |        933        9.33       25.03
                               Yes |      1,781       17.81       42.84
       None found within 12 months |      5,716       57.16      100.00
-----------------------------------+-----------------------------------
                             Total |     10,000      100.00

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