Table 1 Radiologic and clinical findings in both groups
|  | PTPF with two screws fixation (n = 15) | PTPF with one screws fixation (n = 24) | P value |
|---|---|---|---|
Follow-up time (months) | |||
 Age (years) | 51.8 ± 13.79 | 54.40 ± 11.95 | 0.538 |
 Gender, Male/Female | 5/10 | 10/14 | 0.570 |
 BMI (Kg/m2) | 24.88 ± 2.408 | 25.17 ± 2.385 | 0.704 |
 Surgical time (min) | 83.0 ± 14.96 | 90.32 ± 14.19 | 0.123 |
 Intraoperative blood loss (ml) | 88.7 ± 20.37 | 102.0 ± 31.26 | 0.142 |
 Postoperative collapse (> 2 mm) | 0/15 | 7/17 | 0.031* |
 LTPA (°) (Postoperative) | 89.56 ± 2.128 | 86.32 ± 1.796 |  |
 LTPA (°) (last follow-up) | 88.38 ± 2.754 | 83.68 ± 1.725 |  |
 LTPA (°) (Difference) | − 1.188 ± 2.971 | − 2.640 ± 1.551 | 0.047* |
 P value | 0.1308 |  < 0.0001* |  |
 LPSA (°) (Postoperative) | 9.188 ± 3.600 | 10.60 ± 3.797 |  |
 LPSA (°) (last follow-up) | 9.313 ± 3.497 | 13.76 ± 3.940 |  |
 LPSA (°) (Difference) | 0.1250 ± 1.408 | 3.160 ± 2.853 | 0.0003* |
P value | 0.7275 |  < 0.0001* |  |
 ROM (°) | 130.1 ± 14.31 | 118.0 ± 10.68 | 0.044* |
 HSS knee score | 94.50 ± 3.633 | 90.04 ± 4.257 | 0.022* |
 Lysholm knee score | 93.63 ± 5.818 | 88.96 ± 7.541 | 0.041* |