Decreased Preoperative Serum AGR as a Diagnostic Marker of Poor Prognosis after Radical Surgery of Upper Urinary Tract and Bladder Cancers from a Pooled Analysis of 9,002 Patients

Table 3

Quality assessment of the included studies.

Study	Selection				Comparability	Exposure			Score
	Definition adequate	Represent of cases	Selection of controls	Definition of controls		Ascertainment of exposure	Same method of ascertainment	Nonresponse rate
Zhang et al. [28]	⨁	⨁	⨁	⨁	⨁	⨁	⨁	⨁	8
Xu et al. [27]	⨁	⨁	⨁	⨁	⨁⨁	⨁	⨁	⨁	9
Fukushima et al. [26]	⨁	⨁	⨁	⨁	⨁	⨁	⨁	◯	7
Otsuka et al. [25]	⨁	⨁	◯	⨁	⨁	⨁	⨁	⨁	7
Pradere et al. [24]	⨁	⨁	⨁	⨁	⨁⨁	⨁	⨁	⨁	9
Omura et al. [23]	⨁	⨁	⨁	⨁	⨁⨁	⨁	⨁	⨁	9
Miura et al. [22]	⨁	⨁	⨁	⨁	⨁⨁	◯	⨁	⨁	8
Liu et al. [33]	⨁	⨁	⨁	⨁	⨁⨁	⨁	⨁	⨁	9
Liu et al. [32]	⨁	⨁	⨁	⨁	⨁	⨁	⨁	⨁	8
Victor et al. [31]	⨁	◯	⨁	⨁	⨁⨁	⨁	⨁	⨁	8
Jeong Seok Oh et al. [30]	⨁	⨁	⨁	⨁	⨁⨁	⨁	⨁	◯	8
Zhang et al. [29]	⨁	⨁	⨁	⨁	⨁	⨁	⨁	⨁	8