Table 4 Predictive value of “highly malignant” and “malignant” electroencephalography patterns and dominant electroencephalography frequency for poor neurologic outcome at 1 month
Variables | EEG timing | True positive | False positive | True negative | False negative | Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | NPV (95% CI) | Accuracy (95% CI) |
|---|---|---|---|---|---|---|---|---|---|---|
Highly malignant pattern | < 72 h | 144 | 0 | 110 | 99 | 59.3 (52.8–65.5) | 100.0 (96.7–100.0) | 100 | 52.6 (48.8–56.4) | 72.0 (67.0–76.6) |
Between 72 h and 7 days | 55 | 0 | 38 | 43 | 56.1 (45.7–66.1) | 100.0 (90.8–100.0) | 100 | 46.9 (41.4–52.5) | 68.4 (59.9–76.1) | |
< 7 days | 199 | 0 | 148 | 142 | 58.4 (52.9–63.6) | 100.0 (97.5–100.0) | 100 | 51.0 (47.9–54.2) | 71.0 (66.7–75.0) | |
Highly malignant or malignant patterns | < 72 h | 208 | 24 | 86 | 35 | 85.6 (80.5–89.8) | 78.2 (69.3–85.5) | 89.7 (85.8–92.5) | 71.1 (64.0–77.2) | 83.3 (79.0–87.0) |
Between 72 h and 7 days | 81 | 17 | 28 | 10 | 82.7 (73.7–89.6) | 73.7 (56.9–86.6) | 89.0 (82.5–93.3) | 62.2 (50.7–72.5) | 80.2 (72.5–86.5) | |
< 7 days | 289 | 34 | 114 | 52 | 84.8 (80.5–88.4) | 77.0 (69.4–83.5) | 89.5 (86.3–92.0) | 68.7 (62.7–74.1) | 82.4 (78.7–85.7) | |
Highly malignant or malignant patterns with delta or undetermined frequency | < 72 h | 171 | 2 | 108 | 72 | 70.4 (64.2–76.0) | 98.2 (93.6–99.8) | 98.8 (95.6–99.7) | 60.0 (55.2–64.6) | 79.0 (74.4–83.2) |
Between 72 h and 7 days | 65 | 1 | 37 | 33 | 66.3 (56.1–75.6) | 97.4 (86.2–99.9) | 98.5 (90.3–99.8) | 52.9 (45.8–59.8) | 75.7 (67.9–82.0) | |
< 7 days | 236 | 3 | 145 | 105 | 69.2 (64.0–74.1) | 98.0 (94.2–99.6) | 98.7 (96.2–99.6) | 58.0 (54.0–61.9) | 77.9 (74.0–81.5) |