Table 3.

Spot Sign prediction of hematoma expansion

Variable	LmA (n = 288)	HmA (n = 421)	p value
Sensitivity (95% CI)	0.45 (0.32 - 0.59)	0.45 (0.34 - 0.58)	0.973
Specificity (95% CI)	0.84 (0.79 - 0.89)	0.91 (0.88 - 0.94)	0.015
Positive predictive value (95% CI)	0.40 (0.28 - 0.53)	0.50 (0.37 - 0.63)	0.267
Negative predictive value (95% CI)	0.87 (0.82 - 0.91)	0.90 (0.86 - 0.93)	0.367
Accuracy	0.77	0.84	0.038

^*Significant expansion was defined as >30 % or >6 mL increase from baseline hematoma volume