Table 3 Clinical diagnostic tests based on main predictor variables associated with influenza among military trainees with febrile respiratory illness
Clinical predictor(s) | SN (%) (95% CI) | SP (%) (95% CI) | PPV (%) (95% CI) | NPV (%) (95% CI) |
|---|---|---|---|---|
Cough | 98.3 (97-98) | 11.4 (10-11) | 7.3 (6-7) | 98.9 (98-99) |
Fever | 85.9 (83-87) | 17.1 (16-17) | 6.9 (6-7) | 94.4 (93-95) |
Training week 0-2 | 54.0 (51-56) | 84.0 (83-84) | 19.4 (18-20) | 96.2 (95-96) |
Acute onset | 73.9 (71-76) | 41.9 (41-42) | 8.3 (7-8) | 95.7 (95-96) |
Body aches | 74.8 (72-77) | 29.3 (28-29) | 7.0 (6-7) | 94.2 (93-94) |
Winter | 50.7 (48-53) | 77.6 (77-78) | 13.9 (12-14) | 95.7 (95-95) |
Cough + fever | 84.3 (82-86) | 27.1 (26-27) | 7.6 (7-8) | 96.0 (95-96) |
Cough + training week 0-2 | 53.4 (50-56) | 85.9 (85-86) | 21.3 (19-22) | 96.3 (96-96) |
Cough + training week 0-2 + fever | 43.7 (41-46) | 89.4 (88-89) | 22.7 (21-24) | 95.7 (95-95) |
Cough + training week 0-2 + fever + acute onset | 33.2 (30-35) | 93.9 (93-94) | 27.9 (25-30) | 95.2 (94-95) |
Training week 0-2 + winter | 9.3 (7-10) | 95.4 (95-95) | 12.6 (10-14) | 93.7 (93-93) |
Cough + training week 0-2 + winter | 33.9 (31-36) | 95.8 (95-96) | 36.3 (33-38) | 95.3 (95-95) |
Cough + training week 0-2 + winter + fever | 26.9 (24-29) | 97.0 (96-97) | 39.4 (36-42) | 94.9 (94-95) |