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Periods defined in classification of FRI
| Time frame | Number of studies N = 93 |
|---|---|
| Chronic infection | 12 (13%) |
| > 6 weeks | 3 (3%) |
| > 12 weeks | 3 (3%) |
| > 4 months | 2 (2%) |
| > 6 months | 4 (4%) |
| Infected non-union | 12 (13%) |
| > 3 months | 1 (1%) |
| > 4 months | 1 (1%) |
| > 6 months | 9 (10%) |
| > 12 months | 1 (1%) |
| Multiple divisions | 3 (3%) |
| Acute < 2 weeks, Subacute 2–6 weeks, Chronic > 6 weeks | 1 (1%) |
| Acute < 30 days, Subacute 1–6 months, Chronic > 6 months | 2 (2%) |
| No period of time mentioned | 66 (71%) |
