| Cases | Controls | p value | |
| Quadriceps tendon thickness >6.1 mm; N* (%)† | 18 (30) | 2 (3.3) | 0.0001 |
| Suprapatellar bursitis; N (%) | 1 (1.6) | 0 | 0.8 |
| Superior pole of patella erosion; N (%) | 0 | 0 | 1 |
| Superior pole of patellar enthesophyte; N (%) | 41 (68.3) | 24 (40) | 0.005 |
| Patellar ligament thickness >4 mm (inferior pole of patella); N (%) | 22 (36.6) | 14 (23.3) | 0.02 |
| Inferior pole of patella erosion; N (%) | 0 | 0 | 1 |
| Inferior pole of patella enthesophyte; N (%) | 20 (33.3) | 12 (20) | 0.01 |
| Patellar ligament thickness >4 mm (insertion at the tibial tuberosity); N (%) | 21 (35) | 10 (16.7) | 0.01 |
| Infrapatellar bursitis; N (%) | 0 | 0 | 1 |
| Tibial tuberosity erosion; N (%) | 0 | 0 | 1 |
| Tibial tuberosity enthesophyte; N (%) | 14 (23.3) | 1 (1.6) | 0.0001 |
| Achilles tendon thickness >5.29 mm; N (%) | 10 (16.6) | 1 (1.6) | 0.0001 |
| Retrocalcaneal bursitis; N (%) | 6 (10) | 0 | 0.0001 |
| Posterior pole of calcaneus erosion; N (%) | 0 | 0 | 1 |
| Posterior pole of calcaneus enthesophyte; N (%) | 54 (90) | 20 (33.3) | 0.0001 |
| Plantar aponeurosis thickness >4.4 mm; N (%) | 3 (5) | 0 | 0.8 |
| Inferior pole of calcaneus erosion; N (%) | 0 | 0 | 1 |
| Inferior pole of calcaneus enthesophyte; N (%) | 23 (38.3) | 22 (36.6) | 0.8 |
*N is the number of entheseal sites resulted abnormal according to the GUESS score.
†(%) is the prevalence entheseal sites abnormalities in the case and control population respectively.