Table 3 Cutoff points and diagnostic values of ferritin test for any grade of liver hemosiderosis (n = 400).
Cutoff points | Sensitivity,% | 95% CI | Specificity,% | 95% CI | PPV,% | 95% CI | NPV,% | 95% CIs |
|---|---|---|---|---|---|---|---|---|
> 900 | 69.78 | 63.3–75.7 | 58.76 | 48.3–68.7 | 79.7 | 73.4–85.1 | 45.6 | 36.7–54.7 |
> 1000 | 68.00 | 61.5–74.0 | 64.95 | 54.6–74.4 | 81.8 | 75.5–87.1 | 46.7 | 38.0–55.4 |
> 1090 | 66.67 | 60.1–72.8 | 68.04 | 57.8–77.1 | 82.9 | 76.6–88.1 | 46.8 | 38.4–55.4 |
> 1200 | 61.33 | 54.6–67.7 | 70.10 | 60.0–79.0 | 82.6 | 76.0–88.1 | 43.9 | 35.9–52.1 |
> 1300 | 57.33 | 50.6–63.9 | 71.13 | 61.0–79.9 | 82.2 | 75.3–87.8 | 41.8 | 34.2–49.7 |
> 1400 | 53.33 | 46.6–60.0 | 72.16 | 62.1–80.8 | 81.6 | 74.4–87.5 | 40.0 | 32.7–47.7 |
> 1500 | 48.00 | 41.3–54.7 | 72.16 | 62.1–80.8 | 80.0 | 72.3–86.4 | 37.4 | 30.5–44.8 |
> 1600 | 46.22 | 39.6–53.0 | 73.20 | 63.2–81.7 | 80.0 | 72.1–86.5 | 37.0 | 30.1–44.2 |
> 1700 | 43.56 | 37.0–50.3 | 76.29 | 66.6–84.3 | 81.0 | 72.9–87.6 | 36.8 | 30.1–43.9 |
> 1800 | 42.22 | 35.7–49.0 | 77.32 | 67.7–85.2 | 81.2 | 72.9–87.8 | 36.6 | 30.0–43.6 |
> 1900 | 39.11 | 32.7–45.8 | 80.41 | 71.1–87.8 | 82.2 | 73.7–89.0 | 36.3 | 29.8–43.1 |
> 2000 | 35.56 | 29.3–42.2 | 83.51 | 74.6–90.3 | 83.3 | 74.4–90.2 | 35.8 | 29.6–42.5 |
> 2102 | 34.67 | 28.5–41.3 | 85.57 | 77.0–91.9 | 84.8 | 75.8–91.4 | 36.1 | 29.9–42.7 |
> 2200 | 34.22 | 28.0–40.8 | 86.60 | 78.2–92.7 | 85.6 | 76.6–92.1 | 36.2 | 30.0–42.8 |
> 2300 | 32.89 | 26.8–39.4 | 87.63 | 79.4–93.4 | 86.0 | 76.9–92.6 | 36.0 | 29.9–42.5 |
> 2400 | 31.56 | 25.5–38.1 | 89.69 | 81.9–94.9 | 87.7 | 78.5–93.9 | 36.1 | 30.0–42.5 |
> 2500 | 29.33 | 23.5–35.8 | 91.75 | 84.4–96.4 | 89.2 | 79.8–95.2 | 35.9 | 29.9–42.2 |
