Table 7 Influenza Diagnostic Algorithm Performance Including the following Symptoms: Fever> = 38 °C + Cough + Nasal discharge
Case definition | Sensitivity | Specificity | PPV* | NPV † | P-values |
|---|---|---|---|---|---|
Fever >=38°+ Cough + Nasal discharge | % (95% CI) | % (95% CI) | % (95% CI) | % (95% CI) | |
All cases (n=1653) | 65.0 (60.0–70.0) | 72.0 (69.5–74.4) | 40.0 (36.1–40.0) | 88.2 (86.2–90.1) | < 0.0001 |
Age groups (years) | |||||
0 - < 2 | 59.1 (44.6–73.6) | 60.0 (54.0–66.0) | 20.0 (13.1–27.0) | 89.5 (85.0–94.1) | < 0.01 |
2 - < 5 | 69.2 (59.0–79.4) | 60.6 (55.0–66.4) | 33.1 (26.0–40.3) | 87.5 (83.0–92.2) | < 0.001 |
5 - < 15 | 69.0 (61.0–77.0) | 77.5 (73.6–81.5) | 48.0 (41.0–55.2) | 89.3 (86.2–92.4) | < 0.001 |
15 - < 50 | 56.5 (46.0–67.0) | 84.3 (80.1–88.6) | 52.2 (42.0–62.4) | 87.0 (82.5–90.5) | < 0.001 |
≥ 50 | 71.4 (52.1–91.0) | 81.2 (70.1–92.2) | 62.5 (43.1–82.0) | 87.0 (77.2–97.0) | 0.16 |