Apparent diffusion coefficient measurement by diffusion weighted magnetic resonance imaging is a useful tool in differentiating renal tumors

Table 4 Meta-regression analyses of apparent diffusion coefficient values in malignant and benign renal tumor tissues

Heterogeneity factors	Coefficient	SE	t	P (Adjusted)	95% CI
Heterogeneity factors	Coefficient	SE	t	P (Adjusted)	LL	UL
Year	−0.424	0.358	−1.18	0.771	−1.204	0.356
Sample Size	−0.003	0.025	−0.12	1	−0.058	0.052
Country	−0.461	0.315	−1.47	0.598	−1.147	0.224
Language	1.857	1.721	1.08	0.827	−1.895	5.608
Ethnicity	0.159	0.752	0.21	1	−1.48	1.8
Machine type	0.433	0.74	0.59	0.988	−1.18	2.047
b value	0.038	0.332	0.11	1	−0.686	0.761

SE = standard error; 95% CI = 95% confidence intervals; LL = lower limit; UL = upper limit.

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