Table 1.
Characteristics of subjects.
|
Without RC-tear RC-tear (N = 294) |
RC-tear (N = 109) |
p-values | |
|---|---|---|---|
| DEMOGRAPHIC DATA | |||
| N | 294 | 109 | |
| Age (years) | 42.1 (14.3) | 55.1 (10.8) | <0.001 |
| Female, N (%) | 115 (39.1) | 40 (36.7) | 0.73 |
| RADIOGRAPHIC DATA | |||
| Surface head of humerus (mm2) | 1954 (383) | 1940 (366) | 0.74 |
| SSp MUSCLE | |||
| Normalized CSA | 0.81 (0.21) | 0.60 (0.26) | <0.001 |
| Without fatty infiltration, N (%) | 232 (78.9) | 46 (42.2) | *<0.001 |
| With fatty infiltration, N (%) | 62 (21.1) | 63 (57.8) | |
| SSc MUSCLE | |||
| Normalized CSA | 1.62 (0.76) | 1.43 (0.64) | 0.01 |
| Without fatty infiltration, N (%) | 208 (73.2) | 41 (37.6) | *<0.001 |
| With fatty infiltration, N (%) | 76 (26.8) | 68 (62.4) | |
| ISp MUSCLE | |||
| Normalized CSA | 1.17 (0.32) | 0.99 (0.35) | <0.001 |
| Without fatty infiltration, N (%) | 249 (84.6) | 61 (56.0) | *<0.001 |
| With fatty infiltration, N (%) | 45 (15.2) | 48 (44.0) | |
| Tmi MUSCLE | |||
| Normalized CSA | 0.71 (0.21) | 0.71 (0.25) | 0.97 |
| Without fatty infiltration, N (%) | 279 (94.9) | 91 (83.5) | *0.001 |
| With fatty infiltration, N (%) | 15 (5.1) | 18 (16.5) | |
| Del MUSCLE | |||
| Normalized CSA | 6.17 (1.68) | 6.24 (1.61) | 0.70 |
Means (SD) are provided unless otherwise stated. Muscle cross-sectional area (CSA) is normalized to the humeral head surface. Fatty infiltration was assessed according to the Goutallier classification score, shown are the number and (%) of patients without (Goutallier 1) or with fatty infiltration (Goutallier 2,3,4). Supraspinatus (SSp), Subscapularis (SSc), Infraspinatus (ISp), Teres minor (Tmi), Deltoid (Del).
Nominal variables between subjects without RC-tear and RC-tear patients were compared with t-tests.
*
χ2-tests were used to compare fatty infiltration across the Goutallier scores between subjects without RC-tear and RC-tear patients.