Cross-culture adaptation and validation of English version of Rheumatoid Arthritis Knowledge Assessment Scale (RAKAS) in patients with rheumatoid arthritis

Naqvi AA 1 , Hassali MA 2 , Iffat W 3 , Shakeel S 2 , Zia M 4 , Fatima M 4 Show all authors , Iqbal MS 5 , Iqbal MZ 6 , Imam MT 7 , Hossain MA 8 , Ali M 7 , Haseeb A 7

Affiliations 

  • 1 Department of Pharmacy Practice, College of Clinical Pharmacy, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
  • 2 Discipline of Social and Administrative Pharmacy, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Penang, Malaysia
  • 3 Dow College of Pharmacy, Dow University of Health Sciences, Karachi, Pakistan
  • 4 Institute of Physical Medicine and Rehabilitation, Dow University of Health Sciences, Karachi, Pakistan
  • 5 Department of Clinical Pharmacy, College of Pharmacy, Prince Sattam bin Abdulaziz University, Al-Kharj, Saudi Arabia
  • 6 Department of Clinical Pharmacy and Pharmacy Practice, Faculty of Pharmacy, AIMST University, Bedong, Malaysia
  • 7 Department of Clinical Pharmacy, College of Pharmacy, Umm Al Qura University, Makkah, Saudi Arabia
  • 8 Department of Pharmacology and Toxicology, College of Medicine, Umm Al Qura University, Makkah, Saudi Arabia
Int J Rheum Dis, 2020 Jul;23(7):918-927.
PMID: 32525287 DOI: 10.1111/1756-185X.13860

Abstract

AIM: To carry out cross-culture adaptation and validation of the English version of Rheumatoid Arthritis Knowledge Assessment Scale (RAKAS) in patients with rheumatoid arthritis (RA).

METHODS: A cross-sectional study was conducted for 2 months in 2 tertiary care hospitals in Karachi, Pakistan. Sample size was calculated based on item-subject ratio. The translation was carried out using standard procedures for translation and cross-culture adaptation. The validation process included estimation of discrimination power, item difficulty index, factorial, convergent, construct and known group validities and reliability. Reliability of the scale was estimated using Kuder-Richardson Formula 20 and a value of σ2  ≥ 0.6 was acceptable. SPSS v23, Remark Classic OMR v6 software and MedCalc Statistical Software v16.4.3, were used to analyze the data. The study was approved by the relevant ethics committee (IRB#NOV:15).

RESULTS: The mean score was 7.68 ± 2.52 (95% CI: 7.31-8.05) for 177 patients. The σ2  = 0.601, that is, >0.6, test-retest reliability ρ = .753, P 

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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