Table 3.

Validity of GCSs of 15 and <12 in predicting associated brain lesions.

Validity	GCS 15 For intact brain	GCS<12 For abnormal brain
Sensitivity	41.5%	90.9%
Specifity	92.5%	73.8%
+ve predictive value	84.6%	47.6%
−ve predictive value	61.2%	96.9%
LR+	5.5***	3.5**
LR−	0.52*	0.12***

LR+: likelihood ratio for positives, LR−: likelihood ratio for negatives,

^*poor,

^**fair,

^***good.