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Table 3 Cronbach’s α at 11 follow-ups for patients with an ACL injury and after ACL reconstruction

From: Validation of an 18-item version of the Swedish Knee Self-Efficacy Scale for patients after ACL injury and ACL reconstruction

Follow-ups n Cronbach’s α
K-SES18 K-SES18
present future
10 weeks after ACL injury 228 0.96 0.85
4 months after ACL injury 206 0.95 0.85
8 months after ACL injury 167 0.95 0.88
12 months after ACL injury 133 0.96 0.87
18 months after ACL injury 88 0.95 0.91
Preoperativea 388 0.95 0.82
10 weeks after ACL reconstruction 913 0.93 0.82
4 months after ACL reconstruction 929 0.93 0.81
8 months after ACL reconstruction 877 0.94 0.81
12 months after ACL reconstruction 715 0.95 0.83
18 months after ACL reconstruction 438 0.95 0.84
  1. ACL injury refers to patients treated with rehabilitation, ACL reconstruction refers to patients treated with reconstruction and rehabilitation, K-SES18 the 18-item version of the Knee Self-Efficacy Scale
  2. aFollow-up performed within 6 weeks before ACL reconstruction