Validity and Reliability of the Persian Practice Environment Scale of Nursing Work Index

Safa Elmi, Hadi Hassankhani Farahnaz, Farahnaz Abdollahzadeh, Mohammad Asghari Jafar Abad, Judy Scott, Mina Nahamin


Background: The practice environment pivotal role in patients and nurses better outcomes is evident. Practice Environment Scale of Nursing Work Index (PES‑NWI) is widely utilized to assess nursing work environments. The present study was conducted to demonstrate the validity and reliability of the Persian version of PES‑NWI.

 Materials and Methods: The instrument was translated and its psychometrics were investigated by content, construct validity (factor analysis), and homogeneity (internal consistency and intraclass correlation) on a sample of 350 nurses at educational hospitals in East Azerbaijan, Iran.

Results: The 30 items loaded onto 4 factors explained 34.95–50.06% of the variance. The items across the factors differed slightly from those reported by the original author of the PES‑NWI. Cronbach’s alpha and Pearson coefficient for the entire instrument and also for extracted factors was 0.70–0.96. Conclusions: The Persian version of PES‑NWI has an appropriate level of validity and reliability in the Iranian setting for nurses. The subscale of Nursing Foundations for quality care needs modification.


Iran; nurse; practice environment scale of nursing; reliability; validity

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