Table 2

Sensitivity and specificity of conscious level and urinary continence in predicting good functional outcome at six months in the Lothian stroke register

Numbers of patientsProbability of good outcome
Alive/independentDead/dependent
95% confidence interval in brackets.
Alert+continent5573180.64
Drowsy+continent4170.19
Alert+incontinent271560.15
Drowsy+incontinent51030.05
Total593594
Sensitivity Specificity
Alert v not alert0.98 (0.97 to 0.99)0.20 (0.17 to 0.23)
Continent v incontinent0.95 (0.92 to 0.96)0.44 (0.40 to 0.48)
Alert+continent v other categories0.94 (0.92 to 0.96)0.46 (0.42 to 0.50)
Alert or continent v drowsy+incontinent0.99 (0.98 to 1.00)0.17 (0.14 to 0.20)