Table 3. Analysis of patient- and surgery-related factors associated with postoperative outcomes.
The p-value is presented with the corresponding test statistic in parentheses (t-value for Student’s t-test; F-value for ANOVA)
Differences between two independent groups (sex, side, meniscus, smoking, full weight-bearing, pre-op Tegner) were analyzed using the Student’s t-test. Comparisons involving more than two groups (age, time to surgery, topography, tear type, pre-op IKDC) were analyzed using one-way ANOVA.
Different superscript letters (a, b, c) within the same column indicate a statistically significant difference (p < 0.05) between specific subgroups.
| Factor | N (%) | Mean post-op IKDC ± SD | p-value (Stat) | Mean post-op Tegner ± SD | p-value (Stat) |
| Age | |||||
| <20 years | 5 (9.4%) | 78.4 ± 8.5 | 0.659 (F = 0.42) | 6.55 ± 0.8ᵃ | 0.020 (F = 4.22) |
| 20-30 years | 15 (28.3%) | 76.4 ± 10.2 | 6.45 ± 1.2ᵇ | ||
| >30 years | 33 (62.3%) | 75.85 ± 11.4 | 6.44 ± 1.6ᵇ | ||
| Sex | |||||
| Male | 47 (88.7%) | 76.3 ± 10.8 | 0.804 (t = 0.25) | 6.46 ± 1.7 | 0.881 (t = 0.15) |
| Female | 6 (11.3%) | 75.4 ± 12.1 | 6.35 ± 1.5 | ||
| Side | |||||
| Right | 31 (58.5%) | 77.1 ± 11.0 | 0.457 (t = 0.75) | 6.46 ± 1.8 | 0.858 (t = 0.18) |
| Left | 22 (41.5%) | 74.9 ± 10.5 | 6.35 ± 1.6 | ||
| Time to surgery | |||||
| <3 months | 23 (43.4%) | 78.1 ± 9.9 | 0.176 (F = 1.80) | 7.15 ± 1.4 ᵃ | 0.029 (F = 3.85) |
| 3-6 months | 20 (37.7%) | 76.0 ± 11.2 | 6.35 ± 1.7 ᵇ | ||
| >6 months | 10 (18.9%) | 73.8 ± 12.5 | 5.40 ± 1.9 ᶜ | ||
| Meniscus | |||||
| Lateral | 18 (34.0%) | 74.48 ± 11.8 | 0.416 (t = 0.82) | 6.35 ± 1.8 | 0.781 (t = 0.28) |
| Medial | 35 (66.0%) | 76.91 ± 10.4 | 6.50 ± 1.7 | ||
| Smoking | |||||
| Yes | 10 (18.9%) | 68.0 ± 12.4 | 0.020 (t = 2.38) | 5.75 ± 1.8 | 0.260 (t = 1.14) |
| No | 43 (81.1%) | 78.1 ± 11.2 | 6.61 ± 2.1 | ||
| Topography (rim) | |||||
| Zone 1 (red-red) | 8 (15.1%) | 77.75 ± 9.8 | 0.887 (F = 0.12) | 6.83 ± 1.5 | 0.640 (F = 0.45) |
| Zone 2 (red-white) | 37 (69.8%) | 75.97 ± 10.5 | 6.44 ± 2.0 | ||
| Zone 3 (white-white) | 8 (15.1%) | 75.63 ± 11.1 | 6.14 ± 1.9 | ||
| Tear type | |||||
| Vertical longitudinal (incl. flap) | 33 (62.3%) | 81.0 ± 9.5ᵃ | 0.040 (F=2.98) | 6.84 ± 1.4ᵃ | 0.010 (F = 4.15) |
| Horizontal (incl. flap) | 10 (18.9%) | 70.0 ± 12.1ᵇ | 6.05 ± 1.8ᵇ | ||
| Radial | 5 (9.4%) | 67.2 ± 13.5ᵇ | 5.60 ± 2.1ᵇᶜ | ||
| Complex | 5 (9.4%) | 63.4 ± 14.0 ᶜ | 5.07 ± 2.2 ᶜ | ||
| Full weight-bearing | |||||
| <30 days | 35 (66.0%) | 76.63 ± 10.1 | 0.519 (t = 0.65) | 7.15 ± 1.6 | 0.984 (t = 0.02) |
| >30 days | 18 (34.0%) | 74.72 ± 10.9 | 7.14 ± 1.9 | ||
| Pre-op Tegner | |||||
| ≤5 | 14 (26.4%) | 74.85 ± 11.5 | 0.145 (t=1.48) | 6.07 ± 2.2 | 0.031 (t=2.21) |
| >5 | 39 (73.6%) | 79.79 ± 9.8 | 7.49 ± 1.5 | ||
| Pre-op IKDC | |||||
| <40 | 4 (7.5%) | 70.0 ± 13.2ᵇ | 0.015 (F = 4.56) | 5.65 ± 2.4ᵇ | 0.021 (F = 4.18) |
| 40-49 | 30 (56.6%) | 76.0 ± 10.4ᵃ | 6.40 ± 1.7ᵃ | ||
| 50-59 | 19 (35.8%) | 78.0 ± 8.9ᵃ | 6.75 ± 1.5ᵃ | ||