Table 5 Correlation between disc morphology and joint effusion in different age groups
Age group | Effusion | Biconcave | Contracture | Lengthened | Irregular | χ2, P | r, P |
|---|---|---|---|---|---|---|---|
≤ 18Y, (n = 390) | NA | 96 (72.4%) | 105 (72.4%) | 53 (94.6%) | 75 (89.3%) | 26.469, 0.000 | −0.025, 0.623 |
Slight | 8 (7.6%) | 38 (26.2%) | 3 (5.4%) | 9 (10.7%) | |||
Massive | 1 (1.0%) | 2 (1.4%) | 0 (0.0%) | 0 (0.0%) | |||
19-30Y, (n = 950) | NA | 282 (88.1%) | 224 (78.6%) | 124 (86.7%) | 176 (87.1%) | 13.893, 0.031 | 0.009, 0.781 |
Slight | 35 (10.9%) | 59 (20.7%) | 18 (12.6%) | 24 (11.9%) | |||
Massive | 3 (0.9%) | 2 (0.7%) | 1 (0.7%) | 2 (1.0%) | |||
> 30Y (n = 420) | NA | 129 (84.3%) | 73 (74.5%) | 40 (72.7%) | 89 (78.1%) | 9.817, 0.133 | 0.077, 0.116 |
Slight | 22 (14.4%) | 21 (21.4%) | 10 (18.2%) | 21 (18,4%) | |||
Massive | 2 (1.3%) | 4 (4.1%) | 5 (9.1%) | 4 (3.5%) | |||
Total (n = 1760) | NA | 507 (87.7%) | 402 (76.1%) | 217 (85.4%) | 340 (85.0%) | 32.901, 0.000 | 0.023, 0.334 |
Slight | 65 (11.2%) | 118 (22.3%) | 31 (12.2%) | 54 (13.5%) | |||
Massive | 6 (1.0%) | 8 (1.5%) | 6 (2.4%) | 6 (1.5%) |