Table 2.

Sensitivity analysis for overall survival

Excluding study	Including studies	HR and 95% CI	P value	Heterogeneity (%)	P value for heterogeneity
Aliustaoglu [23]	22,24–49	1.36 (1.23–1.50)	< 0.001	67.9	< 0.001
Lee [32]	22–31,33–49	1.36 (1.23–1.50)	< 0.001	68.8	< 0.001
Jiang [30]	22–29,31–49	1.38 (1.25–1.53)	< 0.001	68.8	< 0.001
Wang [45]	22–44,46–49	1.38 (1.25–1.52)	< 0.001	69.3	< 0.001
Lian [33]	22–32,34–49	1.35 (1.23–1.49)	< 0.001	67.0	< 0.001
Aldemir [22] (a)	23–49	1.38 (1.25–1.52)	< 0.001	69.2	< 0.001
Aldemir [22] (b)	23–49	1.36 (1.23–1.50)	< 0.001	68.7	< 0.001
Deng [24]	22,23,25–49	1.39 (1.25–1.53)	< 0.001	68.3	< 0.001
Gunaldi [28]	22–27,29–49	1.37 (1.24–1.51)	< 0.001	69.2	< 0.001
Hsu [29]	22–28,30–49	1.38 (1.25–1.53)	< 0.001	68.8	< 0.001
Kim [31]	22–30,32–49	1.39 (1.25–1.53)	< 0.001	68.2	< 0.001
Liu [34]	22–33,35–49	1.38 (1.25–1.52)	< 0.001	69.3	< 0.001
Sun [39]	22–38,40–49	1.38 (1.25–1.53)	< 0.001	69.1	< 0.001
Wang [42]	22–41,43–49	1.33 (1.22–1.45)	< 0.001	55.8	< 0.001
Feng [25] (a)	22–24,26–49	1.37 (1.23–1.52)	< 0.001	68.9	< 0.001
Feng [25] (b)	22–24,26–49	1.36 (1.23–1.51)	< 0.001	68.1	< 0.001
Sun [40]	22–39,41–49	1.37 (1.24–1.51)	< 0.001	69.2	< 0.001
Zhou [49]	22–48	1.37 (1.24–1.52)	< 0.001	69.3	< 0.001
Wen [46]	22–45,47–49	1.37 (1.24–1.51)	< 0.001	69.3	< 0.001
Fuentes [26]	22–25,27–49	1.36 (1.23–1.49)	< 0.001	68.0	< 0.001
Song [38]	22–37,39–49	1.39 (1.28–1.52)	< 0.001	54.1	< 0.001
Wang [43]	22–42,44–49	1.37 (1.24–1.51)	< 0.001	69.3	< 0.001
Wang [44]	22–43,45–49	1.37 (1.24–1.52)	< 0.001	69.3	< 0.001
Ramos-Esquivel [36]	22–35,37–49	1.37 (1.24–1.51)	< 0.001	69.3	< 0.001
Petrillo [35]	22–34,36–49	1.37 (1.24–1.51)	< 0.001	69.3	< 0.001
Saito [37]	22–36,38–49	1.36 (1.23–1.50)	< 0.001	68.5	< 0.001
Gong [27]	22–26,28–49	1.37 (1.24–1.51)	< 0.001	69.4	< 0.001
Zhang [48]	22–47,49	1.37 (1.24–1.52)	< 0.001	69.3	< 0.001
Tang [41]	22–40,42–49	1.37 (1.24–1.51)	< 0.001	69.3	< 0.001
Zhang [47]	22–46,48,49	1.38 (1.25–1.53)	< 0.001	68.9	< 0.001