Frequencies for rx_ce_lownoaged_rxhcc166 variable in rxcoeff dataset : rx_ce_lowno | aged_rxhcc1 | 66 -- | migraine | headaches | Freq. Percent Cum. ------------+----------------------------------- .141 | 1 100.00 100.00 ------------+----------------------------------- Total | 1 100.00 by Jean Roth , jroth@nber.org , 8 Feb 2018