Official Journal of the Italian Society of Orthopaedics and Traumatology
Table 4 Performances of different test methods when discriminating between aseptic and septic nonunion
| Â | Septic nonunion | Aseptic nonunion | Sensitivity | Specificity | PPV | NPV | Regular healers |
|---|---|---|---|---|---|---|---|
Test method | No. of patients who tested positive | % (95% CI) | No. of patients who tested positive | ||||
Long-term TC (study sample) | 29/42 | 2/53 | 69 (53–82) | 96 (86–99) | 94 (77–99) | 80 (67–88) | 3/32 |
Histopathology (study sample) | 6/42 | 7/53 | 14 (6–29) | 87 (74–94) | 46 (20–74) | 56 (45–67) | 5/32 |
SF broth culture | 29/42 | 10/53 | 69 (53–82) | 81 (68–90) | 74 (58–86) | 77 (63–87) | 9/32 |
MF (≥ 0.6 CFU/10 ml) | 33/42 | 20/53 | 79 (63–89) | 62 (48–75) | 62 (48–75) | 79 (63–89) | 10/32 |
MF (≥ 13.6 CFU/10 ml) | 22/42 | 4/53 | 52 (37–68) | 93 (81–98) | 85 (64–95) | 71 (59–81) | 3/32 |