## 4 Discussion
To assess the concurrent validity of the PRIA-RS, [PERSON]'s rank correlation coefficients were used to evaluate its relationships with the SCQ-RARC, CR-IWQ, and AQ-RARC questionnaires [30, 31, 32]. These questionnaires are well-established and reliable tools for assessing various aspects of psychological readiness in Greek injured athletes [10]. A strength of the present study is the use of these three valid and reliable questionnaires to test the concurrent validity. [PERSON] et al. [9] emphasized the need to compare the results of the PRIA-RS with conceptually identical questionnaires, such as the I-PRRS (Injury Psychological Readiness to Return to Sport), RIAI (Re-Injury Anxiety Inventory), and ACL-RSI (Anterior Cruciate Ligament-Return to Sport after Injury), which have not yet been validated in Greek. In contrast, the present study compared the PRIA-RS with valid and reliable Greek questionnaires of similar content. The PRIA-RS showed a strong and statistically significant correlation with the SCQ-RARC, as expected, because high scores on the SCQ-RARC factors indicate high levels of self-confidence, which are also reflected in high scores on the PRIA-RS. Furthermore, the factors of the PRIA-RS, \"Insecurity, Self-confidence, Individual perception\" and \"Fear of re-injury\", correlated strongly with the factors \"Self-confidence due to rehabilitation\" (CO-R) and \"General self-confidence\" (G-CO) of the SCQ-RARC, as anticipated. High scores on both the PRIA-RS and SCQ-RARC indicate high levels of self-confidence. PRIA-RS showed a high but non-statistically significant correlation with the AQ-RARC. According to the AQ-RARC, a high score on the first factor, \"Functional Attention\", signals high levels of functional attention, which is positively correlated with the athlete's self-confidence. This is consistent with the PRIA-RS, where high scores also reflect high levels of self-confidence, a finding confirmed in this study. A statistically significant high correlation was observed between the PRIA-RS factors and the AQ-RARC factor \"Functional Attention\". However, the second factor of the AQ-RARC, \"Distracted Attention\", did not correlate with any PRIA-RS factor. This is likely because the PRIA-RS does not include an item addressing potential distractions in the athlete's attention. Given this, it is recommended to use both constructs when a clinician suspects that an athlete's attention may be prone to distraction and wishes to correlate that distraction with the athlete's psychological readiness. No significant correlation was found between the overall scores of the PRIA-RS and the CR-IWQ. However, the PRIA-RS factor \"Fear of re-injury\" showed a strong negative correlation with the second factor of the CR-IWQ, \"Concern of re-injury due to uncertainty\", as expected. A high score on the \"Fear of re-injury\" factor of the PRIA-RS indicates the absence of fear, which aligns with lower levels of anxiety and lower scores on the corresponding CR-IWQ factor. The lack of correlation between the total scores of the two questionnaires, and between the first factor of the PRIA-RS and the CR-IWQ, can be attributed to the fact that the CR-IWQ specifically assesses re-injury worry, a particular aspect of psychological readiness. In contrast, the PRIA-RS and its first factor, \"Insecurity, Self-confidence, Individual perception\", provide a more holistic evaluation of psychological readiness, which differentiates it from the CR-IWQ. [PERSON] et al. [9] assessed the concurrent validity of the PRIA-RS questionnaire by analyzing the correlations between each question and the final score of the questionnaire. The analysis revealed that six out of the ten questions showed moderate to high correlations with the total score. Specifically, questions 5 and 7 exhibited the highest correlations with the final score. All questions on the PRIA-RS questionnaire demonstrated correlations within the required range of 0.40 to 0.80 [47].