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Table 4 The results of subgroup analysis

From: The Diagnosis of Metastatic Axillary Lymph Nodes of Breast Cancer By Diffusion Weighted Imaging: a meta-analysis and systematic review

Variable Number Pooled sensitivity I 2 (%) Pooled specificity I 2 (%) Positive likelihood ratio Negative likelihood ratio Diagnostic odds ratio
Retrospective 3 0.729 (0.664–0.789) 60.2 % 0.846 (0.807–0.879) 0.0 4.628 (3.627–5.904) 0.350 (0.239–0.514) 14.358 (9.519–21.655)
Prospective 7 0.898 (0.860–0.929) 78.8 % 0.625 (0.600–0.650) 97.1 6.152 (2.387–15.857) 0.156 (0.072–0.342) 43.259 (10.752–174.0)
Field strength (1.5 T) 8 0.841 (0.806–0.872) 85.0 % 0.678 (0.655–0.699) 97.1 6.513 (2.884–14.711) 0.195 (0.12–0.314) 31.716 (15.746–63.884)
Field strength (3.0 T) 2 0.732 (0.640–0.811) 18.2 % 0.738 (0.682–0.789) 95.2 2.716 (0.874–8.438) 0.409 (0.197–0.849) 6.644 (1.086–40.634)
b value <1000 (s/mm2) 8 0.867 (0.831–0.899) 82.0 % 0.646 (0.6239–0.669) 97.1 5.801 (2.575–13.066) 0.177 (0.09–0.323) 35.007 (12.019–101.96)
b value ≥1000 (s/mm2) 2 0.769 (0.696–0.832) 86.8 % 0.861 (0.814–0.901) 71.1 4.888 (2.753–8.679) 0.264 (0.120–0.580) 19.496 (5.243–72.498)