Table 2.

Baseline characteristics of RCTs included in the analysis.

Study	Year	Study type	Intervention	Treatment regimens	No. of patients
Brahmer	2015	Phase III	Nivolumab	3mg/kg ivgtt q2w	135
			Docetaxel	75mg/m2 ivgtt q3w	137
Borghaei	2015	Phase III	Nivolumab	3mg/kg ivgtt q2w	292
			Docetaxel	75mg/m2 ivgtt q3w	290
			Pembrolizumab	2mg/kg ivgtt q3w	344
Herbst	2015	Phase III	Pembrolizumab	10mg/kg ivgtt q3w	346
			Docetaxel	75mg/m2 ivgtt q3w	343
Fehrenbacher	2016	Phase II	Atezolizumab	1200mg ivgtt q3w	144
			Docetaxel	75mg/m2 ivgtt q3w	143
Rittmeyer	2017	Phase III	Atezolizumab	1200mg ivgtt q3w	425
			Docetaxel	75mg/m2 ivgtt q3w	425