Psychometric Analysis of the newly translated Malaysian version of Diabetes Knowledge Questionnaire by Rasch analysis
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1
Faculty of Pharmacy, Mahsa University, Malaysia
Background
Diabetes mellitus (DM) has become one of the most significant non communicable and rampant diseases. Patient education is a key element in the management of diabetes in order to improve patient outcomes. For the assessment of diabetes knowledge, validated tool is essential. Therefore, the aim of this study was to translate and assess the psychometric properties of Malay version of Diabetes Knowledge Questionnaire (M-DKQ) among type 2 diabetes patients.
Methods
Permission was obtained from respective authors to translate the English version of DKQ into Malay language according to established standard international translation guidelines. In this study 50 adult diabetes patients were recruited from Kedah by convenience sampling method. The data were extracted from the self-administered questionnaires and entered manually in the Ministeps (Winsteps) software for Partial Credit Rasch Model. The item and person reliability, infit/ outfit Z-Standard (ZSTD), infit/outfit Mean Square (MNSQ) and point measure correlation (PTMEA Corr) values were analysed for the reliability analyses and construct validation.
Results
Rasch analysis confirmed that the Malay version of DKQ with a three-point rating scale demonstrated good internal consistency (item reliability=0.86, person reliability=0.66). The output tables of item construct showed that values for infit and outfit MNSQ (0.6 to 1.4), infit and outfit ZSTD (±2), and PTMEA correlation (0.3 to 0.6) were within the acceptable range for all the items except for four items: item number 4, 7, 16, and 20. The newly devised translated questionnaire satisfy the specification of the Rasch Model for reliability (n=24) and construct validity (n=20).
Conclusion
The Malay version of DKQ could reliably measure the knowledge of DM among Malaysian adult diabetics. Four items need to be rephrased in order to validate the complete questionnaire construct by Rasch model.
Keywords:
Type 2 diabete mellitus,
Realiabilty,
Malay Version,
Rasch model,
DKQ
Conference:
International Conference on Drug Discovery and Translational Medicine 2018 (ICDDTM '18)
“Seizing Opportunities and Addressing Challenges of Precision Medicine”, Putrajaya, Malaysia, 3 Dec - 5 Feb, 2019.
Presentation Type:
Oral Presentation
Topic:
Metabolic diseases
Citation:
Qamar
M,
Iqubal
RM and
Ahmad
S
(2019). Psychometric Analysis of the newly translated Malaysian version of Diabetes Knowledge Questionnaire by Rasch analysis.
Front. Pharmacol.
Conference Abstract:
International Conference on Drug Discovery and Translational Medicine 2018 (ICDDTM '18)
“Seizing Opportunities and Addressing Challenges of Precision Medicine”.
doi: 10.3389/conf.fphar.2018.63.00077
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Received:
19 Oct 2018;
Published Online:
17 Jan 2019.
*
Correspondence:
Mr. Muhammad Qamar, Faculty of Pharmacy, Mahsa University, Bandar Saujana Putra, Malaysia, mqamar18@gmail.com