Table 1.
Measurements of MRI parameters and correlation with distance run
| Time point parameter | Side | 1 | 2 | 3 | 4 | 5 | Correlation with distance run (p value) |
| Mean days run | 0.1 | 15.5 | 29.1 | 42.8 | 52.5 | ||
| Mean distance run, in km (in mi) | 5 (3.2) | 1068 (664) | 2062 (1282) | 2964 (1842) | 3669 (2280) | ||
| AT diameter (SE) | Right | 6.8 (0.37) | 7.2 (0.44) | 7.6 (0.54) | 7.8 (0.53) | 7.8 (0.55) | <0.001 |
| Left | 6.8 (0.39) | 7.3 (0.49) | 7.6 (0.53) | 7.7 (0.60) | 7.8 (0.66) | <0.001 | |
| SI at insertion of AT | Right | 32.4 (3.96) | 38.5 (5.39) | 40.0 (6.49) | 42.1 (7.08) | 39.2 (7.43) | 0.6 |
| Left | 30.4 (1.80) | 31.8 (2.72) | 28.5 (1.50) | 32.2 (2.37) | 29.5 (1.77) | 0.5 | |
| SI in the middle of the AT | Right | 35.9 (2.72) | 42.9 (6.03) | 45.5 (4.94) | 42.2 (6.52) | 47.9 (8.97) | 0.05 |
| Left | 38.3 (3.92) | 41.1 (5.28) | 36.4 (3.06) | 36.7 (3.80) | 34.1 (5.42) | 0.7 | |
| New lesions in the AT | Right | NA | 0.06 | 0.15 | 0 | 0 | 0.33 |
| Left | NA | 0.03 | 0 | 0.09 | 0 | 0.7 | |
| Distance of the lesion to the insertion of the AT | Right | 12.7 (4.02) | 15.6 (5.19) | 16.5 (3.52) | 15.8 (4.23) | 11.9 (6.03) | |
| Left | 21.8 (4.57) | 21.5 (2.50) | 26.2 (6.19) | 24 (6.03) | 19 | ||
| SI in the calcaneus at the AT insertion | Right | 112.8 (7.30) | 153.3 (13.80) | 170.6 (15.66) | 176.8 (19.66) | 180.1 (18.97) | <0.001 |
| Left | 107.2 (5.38) | 144.7 (9.90) | 160.2 (11.70) | 160.5 (11.54) | 167.0 (12.65) | <0.001 | |
| SI in an innocuous area of the calcaneus | Right | 158.2 (6.78) | 210.8 (18.25) | 243.9 (22.59) | 246.1 (27.49) | 250.2 (26.43) | <0.001 |
| Left | 164.0 (7.20) | 216.4 (14.38) | 248.8 (21.45) | 251.5 (25.1) | 268.6 (25.33) | <0.001 | |
| Maximal SI in any bone | Right | 312.5 (26.58) | 411.7 (30.17) | 423.3 (32.14) | 386.2 (22.29) | 399.9 (26.10) | 0.003 |
| Left | 283.4 (24.29) | 357.7 (24.59) | 385.8 (35.06) | 410.7 (35.43) | 417.3 (39.79) | <0.001 | |
| Number of bone lesions | Right | 2.1 (0.6) | 3.2 (0.62) | 3.5 (0.58) | 3.2 (0.59) | 3.6 (0.61) | 0.016 |
| Left | 2.3 (0.44) | 2.4 (0.43) | 2.3 (0.45) | 3.1 (0.54) | 3.2 (0.55) | 0.002 | |
| SI in the plantar aponeurosis | Right | 25.4 (4.95) | 28 (5.79) | 27.9 (6.59) | 33.7 (8.86) | 34.8 (9.54) | 0.4 |
| Left | 21.4 (1.31) | 22.4 (1.29) | 22.3 (1.31) | 22.1 (2.14) | 20.9 (1.37) | 0.2 | |
| Oedema in the plantar aponeurosis (yes/no) | Right | 0.07 | 0.06 | 0.09 | 0.11 | 0.12 | 0.9 |
| Left | 0 | 0 | 0 | 0.04 | 0 | NA | |
| Retrocalcanear bursa (yes/no) | Right | 0.07 | 0.19 | 0.18 | 0.14 | 0.15 | 0.8 |
| Left | 0.03 | 0.21 | 0.24 | 0.18 | 0.12 | 0.3 | |
| Subcutaneous oedema (yes/no) | Right | 0.05 | 0.64 | 0.65 | 0.79 | 0.81 | <0.001 |
| Left | 0.07 | 0.68 | 0.61 | 0.64 | 0.65 | <0.001 |
For quantitative data, the mean (with SE) is given; for qualitative data, the percentage of positive measurements (mean over both readers) are given. Correlation with distance run: p is calculated by a univariate regression model with the parameter in question as the dependent variable and total distance as the independent variable. Statistically significant correlations are given in bold.