Superparamagnetic iron oxide-enhanced magnetic resonance imaging for focal hepatic lesions: Systematic review and meta-analysis

Table 3 Assessment of the threshold effect in all accuracy studies

Weighted regression (inverse variance)
Variable	Coefficient	SE	t	P value
a	3.643	0.548	6.652	0.0000
b(1)	-0.239	0.314	0.760	0.4617

τ² = 2.3703 (convergence is achieved after five iterations); Restricted Maximum Likelihood estimation (REML). n = 14; Filter OFF; Add 0.5 to all cells of the studies with zero. Spearman correlation coefficient: -0.266, P = 0.358; Logit (true positive rate) vs Logit (false positive rate); Moses’ model (D = a + bS).