Table 2.
Nonunion Chronicity.
| Acute | Chronic | Unspecified | Total | ||||
|---|---|---|---|---|---|---|---|
| No. of studies | No. of nonunions (%) | No. of studies | No. of nonunions (%) | No. of studies | No. of nonunions (%) | N | |
| BMP-7 | 4 | 25 (8) | 8 | 120 (39) | 13 | 160 (52) | 305 |
| Hand/Wrist | — | — | — | — | 1 | 10 (100) | 10 |
| Humerus | 4 | 6 (3) | 8 | 75 (39) | 11 | 113 (58) | 194 |
| Clavicle | 2 | 5 (14) | 2 | 25 (71) | 3 | 5 (14) | 35 |
| Forearm | 2 | 12 (21) | 3 | 20 (30) | 8 | 32 (48) | 66 |
| BMP-2 | 2 | 5 (5) | 2 | 3 (3) | 4 | 89 (92) | 97 |
| Hand/Wrist | 1 | 4 (15) | 1 | 2 (8) | 2 | 20 (77) | 26 |
| Humerus | 1 | 1 (2) | 0 | 0 (0) | 2 | 55 (98) | 56 |
| Clavicle | 0 | 0 (0) | 0 | 0 (0) | 1 | 1 (100) | 1 |
| Forearm | 0 | 0 (0) | 1 | 1 (7) | 2 | 13 (93) | 14 |
Note. BMP = bone morphogenic protein.