Stratifying non-small cell lung cancer patients using an inverse of the treatment decision rules: validation using electronic health records with application to an administrative database

Table 1 Potential categories for the inverse function of the treatment decision

Treatment pattern^†				Corresponding TNM classification (7th edition)
1	Surgical resection			IA, IB, IIA
2	Surgical resection	Adjuvant CTx		(IIA,) IIB
3	Surgical resection	Adjuvant CTx	Adjuvant RTx	IIIA
4	Surgical resection	Adjuvant RTx	Adjuvant CTx
5	Neoadjuvant CTx	Surgical resection
6	Concurrent chemoradiation therapy			(IIIA,) IIIB
7	Chemotherapy			IV

CTx, Chemotherapy, CCRT, concurrent chemoradiation therapy, RTx, Radiotherapy
^†We only considered a subdomain of treatment patterns that are invertible and have sufficient samples, ignoring stage IIA in the class 2 and stage IIIA in the class 6. Also, note that Stage IA, IB, and IIA can have the same treatment pattern

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