Cross-cultural adaptation and validation of the Turkish version of the arthritis self-efficacy scale-8 (ASES-8) in patients with knee osteoarthritis
Bibliographic record
Abstract
Self-efficacy plays a key role in managing chronic conditions such as knee osteoarthritis (KOA), and reliable tools are needed to assess it in different languages and cultures. The arthritis self-efficacy scale-8 (ASES-8) is a widely used measure, but a validated Turkish version is not yet available. This study aimed to develop a Turkish version of the ASES-8 and evaluate its validity and reliability. The ASES-8 questionnaire was translated into Turkish following a standardized cross-cultural adaptation process. Initially, the clarity and comprehensibility of the Turkish version were tested in a sample of 10 patients with knee osteoarthritis (KOA). Subsequently, the final version was administered to an additional 80 KOA patients. All participants completed the questionnaire again 7 days later to assess test-retest reliability. Floor or ceiling effects were considered present if more than 15% of participants obtained the lowest (1) or highest (10) possible score on the scale. Construct validity was assessed in accordance with COSMIN guidelines by testing predefined a priori hypotheses regarding correlations between the ASES-8 and related measures, and structural validity through confirmatory factor analysis, testing a 1-factor (unidimensional) model. Reliability was evaluated through internal consistency (Cronbach's α), test-retest reliability (intraclass correlation coefficient), and measurement error (SEMagreement and individual-level smallest detectable change). Confirmatory factor analysis supported the 1-factor structure, showing excellent fit indices (using the relative chi-square index, the goodness-of-fit index, the Tucker-Lewis index, and the normed fit index). The internal consistency was excellent, with a Cronbach's α of 0.968. The test-retest reliability demonstrated strong stability for both the total scores and the individual items. Hypothesis testing for construct validity was established through strong positive correlations with the pain self-efficacy questionnaire and strong negative correlations with the Tampascale of kinesiophobia; the pain catastrophizing scale; the Western Ontario and McMaster Universities Osteoarthritis Index; and the depression, anxiety, and stress subscales of the depression anxiety and stress scale-42 (r = -0.80 to 0.91). No ceiling effect and minimal floor effect were observed at the total score level. The Turkish version of the ASES-8 has demonstrated evidence of validity and reliability for assessing self-efficacy in patients with knee osteoarthritis.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.008 | 0.015 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".