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Table 2 Numbers of participants who improved or not their LC by more than 1° and reporting or not perceived improvement of GRC ≥ + 2 overall and in each therapy group

From: Patients with adolescent idiopathic scoliosis perceive positive improvements regardless of change in the Cobb angle – Results from a randomized controlled trial comparing a 6-month Schroth intervention added to standard care and standard care alone. SOSORT 2018 Award winner

  Overall
N = 40 (%)
Predictive values of the test, % (95% CI) Schroth exercises + Standard of care, n = 20 Standard of care, n = 20
True positive: Improved based on GRC ≥ 2 and LC change > MID of 10 (n, %) 12 (30%) 67 (41–86) 12 (60%) 0 (0%)
True negative: Not improved based on GRC < 2 and LC change ≤ MID of 10 (n, %) 16 (40%) 73 (49–88) 1 (5%) 15 (75%)
False positive: Improved based on GRC ≥ 2 but LC change ≤ MID of 10 (n, %) 6 (15%) 33 (14–59) 5 (25%) 1 (5%)
False negative: Not improved based on GRC < 2 but LC change > MID of 10 (n, %) 6 (15%) 27 (12–50) 2 (10%) 4 (20%)
  1. GRC Global Rating of Change, LC Largest Curve, MID Minimum Important Difference, n number of participants, 95% CI 95% confidence interval