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Table 3 Descriptive data on final K-SES-D from two independent samples: sample 1 (ACL patients; N = 200), and sample 2 (ACLR patients; N = 58)

From: Cross-cultural adaptation and measurement properties of the Dutch knee self efficacy scale (K-SES)

  K-SES-Dpresent K-SES-Dfuture K-SES-Dtotal
  ACL ACLR ACL ACLR ACL ACLR
Mean 4.6 7.9 6.2 5.3 5.4 7.2
SD 2.3 2.0 2.1 2.6 1.7 1.9
Cronbach’s Alpha 0.92 0.91 0.83 0.81 0.95 0.96
95% CI lower 4.3 7.4 5.9 4.6 4.7 6.7
95% CI upper 4.9 8.4 6.5 6.0 5.3 7.7
Observed range 0–10 0–10 0–10 0–10 0–10 0–10
Skewness 0.15 −1.1 −0.56 − 0.25 0.12 − 0.98
  1. Abbrevations: K-SES-D Knee Self Efficacy Scales Dutch, ACL Anterior Cruciate Ligament, ACLR Anterior Cruciate Ligament Reconstruction, SD Standard Deviation, CI confidence interval