Table 4 Differences in control MRI findings (within 7 days prior to return to play) between professional athletes with and without reinjury
Variables | Non-reinjury (n = 50) | Reinjury (n = 9) | OR (95% CI) | p value |
|---|---|---|---|---|
Transversal and/or mixed connective tissue gap | ||||
Absent | 49 (9.8) | 5 (55.6) | 39.2 (3.64–422.14) | 0.002 |
Present* | 1 (2.0) | 4 (44.4) | ||
Loss of tendon tension | ||||
Absent | 42 (84.0) | 6 (66.8) | 2.63 (0.54–12.7) | 0.231 |
Present* | 8 (16.0) | 3 (33.3) | ||
Longitudinal connective tissue gap | ||||
Absent | 44 (88.0) | 7 (77.8) | 2.10 (0.35–12.52) | 0.417 |
Present | 6 (12.0) | 2 (22.2) | ||
Muscle fibres tear | ||||
Absent | 43 (86.0) | 7 (77.8) | 1.76 (0.30–10.23) | 0.532 |
Present | 7 (14.0) | 2 (22.2) | ||
Loss of pennation angle | ||||
Absent | 38 (76.0) | 7 (77.8) | 1 | |
Present | 12 (24.0) | 2 (22.2) | 0.90 (0.17–4.95) | 0.908 |
Global improvement in oedema | ||||
Absent | 21 (42.0) | 4 (44.4) | 0.91 (0.22–3.78) | 0.891 |
Present | 29 (58.0) | 5 (55.6) | ||
Adaptive oedema | ||||
Absent | 5 (10.0) | 2 (22.2) | 0.39 (0.06–2.41) | 0.310 |
Present | 45 (90.0) | 7 (77.8) | ||
Feather oedema | ||||
Absent | 30 (60.0) | 4 (44.4) | 1.87 (0.45–7.85) | 0.389 |
Present* | 20 (40.0) | 5 (55.6) | ||
Intermuscular oedema | ||||
Absent | 35 (70.0) | 2 (22.2) | 8.17 (1.52–43.99) | 0.015 |
Present* | 15 (30.0) | 7 (77.8) | ||
Scar maturity | ||||
Immature | 18 (36.0) | 5 (55.6) | 0.45 (1.11–1.89) | 0.276 |
Mature | 32 (64.0) | 4 (44.4) | ||
Hypertrophic scar | ||||
Absent | 13 (26.0) | 2 (22.2) | 1.09 (0.23–5.10) | 0.916 |
Present | 36 (72.0) | 7 (77.9) | ||
Scar morphology | ||||
Absent | 10 (20.0) | 2 (22.2) | 1.15 (0.39–3-35) | 0.799 |
Elongated | 34 (68.0) | 6 (66.8) | ||
Round | 5 (10.0) | 0 | ||
Fusiform | 1 (2.0) | 1 (11.1) | ||
Callus gap | ||||
Absent | 46 (92.0) | 6 (66.7) | 5.75 (1.03–32.17) | 0.046 |
Present* | 4 (8.0) | 3 (33.3) | ||
Risk of reinjury | ||||
Low: absence of any radiological sign | 38 (76.0) | 1 (11.11) | ||
Medium: presence one radiological sign | 12 (24.0) | 2 (22.22) | ||
High: presence of two radiological signs | 0 (0.0) | 6 (66.67) | 29.58 (3.86–226.64) | 0.001 |