There was considerable heterogeneity in predicted postoperative complications in both groups in JCOG9204 ( median 31.3 ( range 15.0-68 .2 ) per cent ) , and in 99-PRE ( 35.2 ( 22.6-46 .6 ) per cent ) but not in 99-POST ( 27.7 ( 27.7-27 .7 ) per cent ) from JCOG9907 .