Frequencies for rx_ce_lownoaged_rxhcc80 variable in rxcoeff dataset : rx_ce_lowno | aged_rxhcc8 | 0 -- | aseptic | necrosis of | bone | Freq. Percent Cum. ------------+----------------------------------- .144 | 1 100.00 100.00 ------------+----------------------------------- Total | 1 100.00 by Jean Roth , jroth@nber.org , 8 Feb 2018