Both agents suppressed PTH effectively ( -@ % with paricalcitol and -@ % with calcitriol ; P = @ ) , although the paricalcitol group reached a @ % reduction in PTH sooner at a median @ weeks ( interquartile range -LSB- IQR -RSB- , @ , @ ) versus @ weeks ( IQR , @ , @ ; P = @ ) and had a lower pill burden of @ ( IQR , @ , @ ) versus @ ( IQR , @ , @ ; P = @ ) .