Table 3. OR values for the UTUC subgroups according to clinical characteristics.

Outcome of interest	Studies	Patients	OR	95% CI	P value	Model	Heterogeneity
							I2, P value
Ta/1 vs. T2-4	9	2,462	3.12	1.85–5.27	0.000	Random	86%, 0.000
High grade vs. Low grade	3	799	1.66	1.20–2.29	0.002	Fixed	32%, 0.23
G3 vs. G1 + G2	2	921	1.42	0.75–2.69	0.28	Random	76%, 0.04
G2 + G3 vs. G1	2	921	0.94	0.49–1.79	0.85	Fixed	0%, 0.42
Lymph node metastasis vs. No lymph node metastasis	6	1,834	1.60	1.13–2.26	0.009	Fixed	0%, 0.55
Renal pelvis vs. Ureter	10	2,858	4.28	2.91–6.30	0.000	Random	78%, 0.000
Recurrence vs. No recurrence	2	737	1.28	0.92–1.77	0.14	Fixed	0%, 0.68
Gender (Male vs. Female)	7	2,556	1.01	0.86–1.19	0.90	Fixed	6%, 0.38

Notes.

Abbreviations

CI

confidence interval

Fixed

fixed, inverse variance model

I²

I-squared

OR

odds ratio

Random

random, I–V heterogeneity model