Using 5 consecutive years of NICE guidance to describe the characteristics and influencing factors on the economic evaluation of orphan oncology drugs.

Partitioned survival model was increasingly used to appraise orphan oncology drugs The most useful economic model for orphan oncology drugs in all the guidance was the partitioned survival model, and there was an increasing trend from 2016 to 2020 ( Figure 2 ), which is in line with the work by Williams et al.

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