Table 2. Cancer drugs administered as first-line therapy.

Drug	TTF-1 positive (n=75)	TTF-1 negative (n=47)	P value
Platinum agent			1.00
Carboplatin	57 (76.0)	36 (76.6)
Cisplatin	18 (24.0)	11 (23.4)
Immune checkpoint inhibitor			1.00
Pembrolizumab	50 (66.7)	31 (66.0)
Atezolizumab	25 (33.3)	16 (34.0)
Angiogenesis inhibitor			1.00
Bevacizumab	13 (17.3)	8 (17.0)
None	62 (82.7)	39 (83.0)

Data are number (percent). All P values were calculated with Fisher’s exact test. TTF-1, thyroid transcription factor 1.