Table 2.

Glutathione (GSH) pathway genes.

Study	Sample (number)	Genes	Description
Chiong et al. [21]	99	hGPX1(198 C/T)	It was associated with an increased recurrence risk (HR = 3.0; p = 0.03)
Kang et al. [23]	135	GSTT1-positive	It had a higher risk of BCG nonresponsiveness (HR = 14; p = 0.022)
Ke et al. [22]	191	GSS(rs7265992 A/A) GSS(rs6060124 A/A) GSS(rs4911455 C/C) GPX2(rs10133290 C/C) GSTM4(rs560018 G/G)	They were associated with an elevated risk of recurrence
Ke et al. [22]	191	GPX5(rs377514 C/C) GSTM3(rs4970737 G/G)	They demonstrated protective association