Table 3 Subgroup analysis for the diagnostic performance of DWI in detecting pulmonary lesions
Characteristics | Studies (n) | Pooled sensitivity (95% Cl) | Pooled specificity (95% Cl) |
|---|---|---|---|
Total | 11* | 0.85 (0.77–0.90) | 0.91 (0.82–0.96) |
Year | |||
  > 2011 | 6 | 0.85 (0.76–0.94) | 0.87 (0.76–0.97) |
  ≤ 2011 | 5 | 0.84 (0.74–0.94) | 0.95 (0.89–1.00) |
Design | |||
 Prospective | 6 | 0.85 (0.76–0.94) | 0.89 (0.78–0.99) |
 Retrospective | 5 | 0.84 (0.74–0.94) | 0.93 (0.86–0.99) |
No. of nodules | |||
  ≤ 100 | 7 | 0.87 (0.80–0.94) | 0.91 (0.83–0.99) |
  > 100 | 4 | 0.81 (0.69–0.92) | 0.91 (0.82–1.00) |
Magnetic strength | |||
 3T | 4 | 0.83 (0.71–0.94) | 0.89 (0.78–1.00) |
 1.5T | 7 | 0.86 (0.78–0.94) | 0.92 (0.85–0.99) |
Lesion diameter** | |||
 Only Nodules(≤ 3 cm) | 4 | 0.74 (0.64–0.85) | 0.91 (0.80–1.00) |
 Nodules and Masses | 3 | 0.87 (0.81–0.93) | 0.93 (0.85–1.00) |
Disease in the benign group | |||
 Only inflammation | 3 | 0.90 (0.82–0.98) | 0.94 (0.86–1.00) |
 Inflammation and tumors | 8 | 0.82 (0.74–0.90) | 0.90 (0.82–0.98) |
Parameter | |||
 ADC | 10 | 0.84 (0.77–0.91) | 0.91 (0.84–0.98) |
 SI-CR | 1 | 0.87 (0.68–1.00) | 0.92 (0.73–1.00) |
Reference standard | |||
 His/Fol | 8 | 0.82 (0.75–0.90) | 0.88 (0.79–0.97) |
 His | 3 | 0.90 (0.81–0.99) | 0.96 (0.91–1.00) |