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Table 4 Numbers needed to treat (NNT) with 95% confidence intervals (CI), Absolute risk reduction (ARR) and Relative risk reduction (RRR)

From: Schroth physiotherapeutic scoliosis-specific exercises for adolescent idiopathic scoliosis: how many patients require treatment to prevent one deterioration? – results from a randomized controlled trial - “SOSORT 2017 Award Winner”

  NNT (n, 95% CI) Absolute Risk Reduction (%) Relative Risk Reduction (%)
Largest Cobb Angle 3.6 (2.0 to 28.2) 28 70
Sum of curves 3.1 (1.9 to 14.2) 32 73