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Table 5 Correlation between the subscale present of the K-SES18, the KOOS subscales and the ACL-RSI

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

Follow-ups KOOS KOOS KOOS KOOS KOOS ACL-RSI
pain symptoms ADL sports QoL
r r r r r r
10 weeks after ACL injury .627** .548**   .758** .632**  
4 months after ACL injury .595** .473**   .759** .673**  
8 months after ACL injury .666** .521**   .755** .741** .481**
12 months after ACL injury .628** .569** .742** .814** .775** .594**
18 months after ACL injury .758** .680**   .760** .718** .639**
Preoperativea .667** .609** .685** .729** .653**  
10 weeks after ACL reconstruction .474** .434**   .634** .517**  
4 months after ACL reconstruction .476** .413**   .701** .531**  
8 months after ACL reconstruction .547** .507**   .738** .612** .525**
12 months after ACL reconstruction .592** .515** .630** .746** .657** .608**
18 months after ACL reconstruction .617** .523**   .801** .681** .647**
  1. ACL Anterior Cruciate Ligament, ACL injury refers to patients treated with rehabilitation, ACL reconstruction refers to patients treated with reconstruction and rehabilitation, ACL-RSI Anterior Cruciate Ligament Return to Sport Index, KOOS Knee injury and Osteoarthritis Outcome Score, K-SES18 the 18-item version of the Knee-Self-Efficacy Scale, QoL quality of life
  2. **p < 0.01