TABLE 1.
Performance of Directigen compared to culture during 2 winter seasons
| Culture type | Season | No. of specimens tested | Sensitivity (%)a | Specificity (%) | Positive predictive value (%) | Negative predictive value (%) |
|---|---|---|---|---|---|---|
| FSC | 1997-1998 | 261 | 77 (68-86) | 91 (87-95) | 78 (69-87) | 90 (86-94) |
| 1998-1999 | 692 | 76 (70-82) | 96 (94-98) | 88 (83-93) | 92 (90-94) | |
| CRC | 1997-1998 | 137 | 61 (44-78) | 94 (89-99) | 77 (61-93) | 88 (82-94) |
| 1998-1999 | 153 | 66 (50-82) | 97 (94-100) | 88 (76-100) | 88 (82-94) |
a
Numbers in parentheses are 95% confidence intervals.