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

Table 5 Meta-regression analyses of apparent diffusion coefficient values in normal and benign renal tumor tissues

Heterogeneity factors	Coefficient	SE	t	P (Adjusted)	95% CI
Heterogeneity factors	Coefficient	SE	t	P (Adjusted)	LL	UL
Year	−3.385	0.97	−3.49	0.114	−7.558	0.789
Sample Size	−0.364	0.07	−5.18	0.149	−0.667	−0.061
Country	−1.785	0.259	−6.89	0.026	−2.901	−0.67
Machine type	−5.645	1.444	−3.91	0.092	−11.856	0.567
b value	−0.383	0.263	1.46	0.492	−0.746	1.513

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

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