Table 3 Discriminative value of the ABCD 2 rule to identify patients at high risk of stroke at one and three years
Patients at high risk of stroke (as per international guidelines) | Discrimination (95% confidence interval) | ||
|---|---|---|---|
ABCD2 ≥ 3 (US guidelines) | Sensitivity | Specificity | Area under curve |
1 year | 1.00 (0.59 - 1.00) | 0.34 (0.24 - 0.45) | 0.67 (0.62 – 0.72) |
3 years | 0.92 (0.64 - 1.00) | 0.36 (0.25 - 0.47) | 0.64 (0.55 – 0.73) |
ABCD2 ≥ 4 (UK & New Zealand guidelines) | |||
1 year | 0.86 (0.42 - 1.00) | 0.48 (0.36 - 0.59) | 0.67 (0.55 – 0.76) |
3 years | 0.77 (0.46 - 0.95) | 0.49 (0.37 - 0.60) | 0.63 (0.50 – 0.76) |
ABCD2 ≥ 5 (Australian guidelines) | |||
1 year | 0.71 (0.29 - 0.96) | 0.67 (0.56 - 0.77) | 0.69 (0.51 – 0.88) |
3 years | 0.62 (0.32 - 0.86) | 0.68 (0.57 - 0.79) | 0.65 (0.50 – 0.80) |