Table 1.

Size-based criteria for response to chemotherapy

Criteria	RECIST	Modified RECIST	WHO	JOA	Modified Choi
Measurement	1 direction	2 directions	2 directions	1 and 2 directions	1 direction
CR	Disappear	Disappear	Disappear	Disappear	Disappear
PR	≥ 30% decrease	≥ 50% decrease	≥ 50% decrease	1d ≥ 30% decrease or 2d ≥ 50% decrease	≥ 10% decrease
MR	–	–	–	2d 25–50%	–
SD	non PR and PD	non PR and PD	non PR and PD	non PR and PD	non PR and PD
PD	≥ 20% increase	≥ 44% increase	≥ 25% increase	1d ≥ 10% increase or 2d ≥ 25% increase	≥ 10% increase

CR complete response, PR partial response, MR minor response, SD stable disease, PD progressive disease, 1d one direction, 2d two directions