Frequencies for rx_ce_lownoaged_rxhcc42 variable in rxcoeff dataset : rx_ce_lowno | aged_rxhcc4 | 2 -- | systemic | lupus | erythematos | us, other | connective | tissue | Freq. Percent Cum. ------------+----------------------------------- .255 | 1 100.00 100.00 ------------+----------------------------------- Total | 1 100.00 by Jean Roth , jroth@nber.org , 2 May 2016