Frequencies for first 10,000 rows of rx1cat4 variable in nhamcsed2006 dataset : for rx1, multum drug category #4 - | detailed | Freq. Percent Cum. ----------------------------------------+----------------------------------- cns: anti-parkinson agents: anticholine | 126 1.26 1.26 . | 9,874 98.74 100.00 ----------------------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016