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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