Table 3.

Jadad quality assessment of the included studies.

Study [year]	Randomization	Blinding	An account of all patients	Overall score
Kwon et al. [2014]	2	2	1	5
Robert et al. [2015]	2	2	1	5
Weber et al. [2015]	2	0	1	3
Brahmer et al. [2015]	2	0	1	3
Borghaei et al. [2015]	2	0	1	3
Motzer et al. [2015]	2	0	1	3
Ribas et al. [2015]	2	0	1	3
Herbst et al. [2015]	2	0	1	3
Robert et al. [2015]	2	0	1	3
Larkin et al. [2015]	2	2	1	5
Postow et al. [2015]	2	2	1	5