# Translation, validity and reliability of the Turkish Chronic Illness Job Strain Scale (CIJSS) in people with inflammatory arthritis

## TL;DR

This paper adapts and validates a Turkish version of a job strain scale for people with inflammatory arthritis, showing it is reliable and useful for clinical and vocational purposes.

## Contribution

The Turkish adaptation of the CIJSS is validated for use in rheumatologic populations, offering a culturally appropriate assessment tool.

## Key findings

- The Turkish CIJSS showed high internal consistency (Cronbach’s α = 0.96) and strong test–retest reliability (ICC(2,1) = 0.88).
- The scale met Rasch model requirements and demonstrated significant correlations with other work and health measures.
- The Turkish CIJSS is valid and reliable for assessing job strain in individuals with inflammatory arthritis.

## Abstract

This study aimed to adapt the Chronic Illness Job Strain Scale (CIJSS) into Turkish and evaluate its validity and reliability in individuals with rheumatologic conditions.

The CIJSS was culturally adapted following Beaton’s protocol. Construct validity was assessed using Rasch analysis. Concurrent validity was examined through correlations with work-related [Work Limitation Questionnaire-Short Form (WLQ-SF), Rheumatoid Arthritis Work Instability Scale (RA-WIS), Work Productivity and Activity Impairment General Health V2.0 (WPAI-GH)] and health-related [Health Assessment Questionnaire (HAQ), Rheumatoid Arthritis Impact of Disease (RAID)] measures. Test–retest reliability was assessed 2 weeks later.

The CIJSS demonstrated high internal consistency (Cronbach’s α = 0.96) and excellent test–retest reliability (Spearman’s r = 0.886; ICC(2,1) = 0.88). The scale met Rasch model requirements for fit. Significant correlations were observed between the CIJSS total score and the WLQ total score (r = –0.61), WPAI scores (r = 0.19–0.47), HAQ (r = 0.33), and RAID (r = 0.61), supporting concurrent validity.

The Turkish CIJSS is a valid, reliable, and culturally appropriate tool for assessing job strain in individuals with inflammatory arthritis. It can support both clinical assessment and vocational rehabilitation planning for Turkish-speaking populations.