Table 3 Diagnostic performance for acute posterior stroke absence or presence diagnosed with an incremental stroke protocol
Sensitivity (Se) | Specificity (Sp) | |||
|---|---|---|---|---|
Se % (95 % CI) | p-value* | Sp % (95 % CI) | p-value* | |
Ischemia/ Infarct absent (Level of confidence score 5 and 6) | ||||
(1) NCCT | 41.4 (32.9–50.0) | (1) vs. (2): 0.103 | 83.7 (80.0–87.4) | (1) vs. (2): < 0.0001 |
(2) NCCT + CTA-SI | 52.3 (43.3–61.2) | (1) vs. (3): 0.0007 | 95.7 (93.8–97.6) | (1) vs. (3): < 0.0001 |
(3) NCCT+ CTA-SI + CTP | 64.9 (55.7–74.0) | (2) vs. (3): 0.072 | 92.8 (90.4–95.2) | (2) vs. (3): 0.188 |
Infarct present (Level of confidence score ≤ 2 vs. > 2) | ||||
(1) NCCT | 28.8 (20.6–37.1) | (1) vs. (2): 0.032 | 91.5 (88.5–94.4) | (1) vs. (2): < 0.0001 |
(2) NCCT+ CTA-SI | 43.2 (33.9–52.6) | (1) vs. (3): < 0.0001 | 97.7 (96.4–98.9) | (1) vs. (3): 0.002 |
(3) NCCT+ CTA-SI + CTP | 59.0 (49.3–68.7) | (2) vs. (3): 0.025 | 96.1 (94.2–98.0) | (2) vs. (3): 0.318 |