Research Article

Somatosensory and Brainstem Auditory Evoked Potentials Assessed between 4 and 7 Days after Severe Stroke Onset Predict Unfavorable Outcome

Table 3

Prognostic authenticity of possible predictors for unfavorable outcomes at 1–3 d and 4–7 d after stroke onset.

Prognostic predictorsSensitivity
% (95% CI)
1–3 d/4–7 d
Specificity
% (95% CI)
1–3 d/4–7 d
Positive predictive value % (95% CI)
1–3 d/4–7 d
Negative predictive value
% (95% CI)
1–3 d /4–7 d
Positive likelihood ratios
% (95% CI)
1–3 d/4–7 d

GCS
 3–522.5 (14.6–32.8)/
62.9 (52.0–72.7)
85.1 (73.8–92.2)/
80.6 (68.8–88.9)
66.7 (47.1–82.1)/
81.2 (69.6–89.2)
45.2 (36.4–54.3)/
62.1 (51.0–72.1)
1.51 (0.76–3.00)/
3.24 (1.94–5.42)
SLSEP
 Abnormality of N2096.6 (89.8–99.1)/
100 (94.8–100)
17.9 (90.0–29.6)/
26.9 (17.1–39.3)
61.0 (52.4–69.0)/
64.5 (55.8–72.3)
80.0 (51.4–94.7)/
100 (78.1–100)
1.18 (1.05–1.33)/
1.37 (1.18–1.58)
 Bilateral absence of N206.7 (2.8–14.6)/
48.3 (37.7–59.1)
100 (93.2–100)/
100 (93.2–100)
100 (51.7–100)/
100 (89.8–100)
44.7 (36.6–53.0)/
59.3 (49.6–68.3)
9.10 (0.52–160.13)/
65.22 (4.09–1040.76)
BAEP
 Abnormality of V75.3 (64.8–83.5)/
91.0 (82.6–95.8)
37.3 (26.1–50.0)/
43.3 (31.4–55.9)
61.5 (51.6–70.5)/
68.1 (58.8–76.1)
53.2 (38.2–67.6)/
78.4 (61.3–89.3)
1.20 (0.96–1.50)/
1.60 (1.29–2.00)
 Bilateral absence of V11.2 (5.8–20.1)/
38.2 (28.3–49.2)
100 (93.2–100)/
100 (93.2–100)
100 (65.5–100)/
100 (87.4–100)
45.9 (37.7–54.3)/
54.9 (45.7–63.9)
15.17 (0.91–255.14)/
51.57 (3.22–826.44)

GCS, Glasgow Coma Scale; SLSEP, short-latency somatosensory evoked potential; BAEP, brainstem auditory evoked potential.