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Table 3 Distribution of results of SLSD: steps to reach the pain levels 2, 2 to 5, and 5

From: Evaluation and Validation of a Joint Stress Test to Induce Activity-Related Knee Joint Discomfort — a Prospective Case-Control Study

Parameters of SLSD Test 1 Test 2 ICC
SLSD test [steps] pain 2
ArJD (n = 15) 21.1 (15.4 to 26.8) 20.5 (14.0 to 27.0) 0.555 (− 0.407 to 0.854)
OA (n = 14) 9.9 (6.6 to 13.3) 9.5 (6.7 to 13.3) 0.7 (0.024 to 0.905)
SLSD test [steps] pain between 2 and 5
ArJD (n = 15) 34.5 (24.9 to 44.1) 37.7 (28.1 to 47.4) 0.789 (0.382 to 0.929)
OA (n = 15) 14.3 (9.1 to 19.4) 13.2 (9.5 to 19.9) 0.737 (0.160 to 0.916)
SLSD test [steps] pain 5
ArJD (n = 15) 55.5 (45.0 to 66.) 58.2 (43.9 to 72.5) 0.815 (0.449 to 0.938)
OA (n = 15) 24.2 (17.1 to 31.3) 22.1 (16.2 to 28.0) 0.779 (0.352 to 0.926)
  1. Values are means (95 % CI). Abbreviations: ArJD activity-related joint discomfort, OA osteoarthritis, ICC intra-class correlation, SLSD single-leg-step-down