Table 3.

Pooled sensitivity, specificity, positive and negative likelihood ratio’s, diagnostic odds ratio’s and funnel plot’s asymmetry for CTA vs DSA per category

		Mean value (95% CI)
Category	No. of studies	Sensitivity (%)	Specificity (%)	Positive LRϕ (%)	Negative LRϕ (%)	DOR*	Funnel plot asymmetry (p value)
Any BCI [6, 20, 23–25, 34, 36, 37]	8	64 [0.53–0.74]	0.95 [0.87–0.98]	11.8 [5.6–24.9]	0.38 [0.30–0.49]	31 [17–56]	0.914
BCVIcarotid [6, 20, 23–25, 35, 37]	7	70 [52–84]	98 [94–99]	35.4 [10.3–121.3]	0.31 [0.17–0.53]	116 [23–583]	0.187
BCVIvertebral [6, 20, 23–25, 35, 37]	7	70 [55–82]	99 [0.94 –1.00]	47.8 [10.3–221.8]	0.30 [0.19–0.48]	158 [26–962]	0.474

*Diagnostic odds ratio, ϕLikelihood ratio, BCVI blunt cerebrovascular injury