| Title |
Testing measurement equivalence of the SF-36 questionnaire across patients on hemodialysis and healthy people
|
|---|---|
| Published in |
Geriatric Nephrology and Urology, September 2015
|
| DOI | 10.1007/s11255-015-1092-z |
| Pubmed ID | |
| Authors |
Zahra Bagheri, Peyman Jafari, Marjan Faghih, Elahe Allahyari, Tania Dehesh |
| Abstract |
Differential item functioning (DIF) occurs when members from different groups respond differently to particular items in a health-related quality of life (HRQoL) questionnaire after controlling for underlying HRQoL construct. This study aimed to assess DIF in the SF-36 questionnaire and its effect on comparing HRQoL scores across patients on HD and healthy people. One hundred fifty patients on maintenance hemodialysis (HD) and 642 healthy individuals filled out the Persian version of the SF-36 questionnaire. Multiple-group multiple-indicator multiple-causes (MG-MIMIC) model was used to assess DIF across patients on HD and healthy population. Sixteen out of 36 (44.4 %) items were flagged with DIF. Six out of 16 items (37.5 %) were flagged with uniform DIF, nine items (56.2 %) with non-uniform DIF, and one item (6.2 %) with both uniform DIF and non-uniform DIF. DIF items were associated with all subscales with the exception of the limitation due to physical problems and bodily pain subscales. The significant lower HRQoL scores of patients on HD in comparison with healthy people in the physical functioning and vitality subscales did not change after removing the items with uniform DIF. Our findings revealed that patients on HD and healthy people perceived the meaning of the items in SF-36 questionnaire differently. Although the impact of DIF is minimal, the cross-group comparison across patients on HD and healthy people should be performed with caution. |
X Demographics
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Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 41 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 41 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 7 | 17% |
| Student > Ph. D. Student | 5 | 12% |
| Other | 3 | 7% |
| Student > Doctoral Student | 2 | 5% |
| Student > Bachelor | 2 | 5% |
| Other | 5 | 12% |
| Unknown | 17 | 41% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 7 | 17% |
| Nursing and Health Professions | 5 | 12% |
| Agricultural and Biological Sciences | 4 | 10% |
| Psychology | 2 | 5% |
| Mathematics | 1 | 2% |
| Other | 5 | 12% |
| Unknown | 17 | 41% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 04 September 2015.
All research outputs
#20,656,820
of 25,374,917 outputs
Outputs from Geriatric Nephrology and Urology
#1,057
of 1,493 outputs
Outputs of similar age
#203,343
of 277,052 outputs
Outputs of similar age from Geriatric Nephrology and Urology
#17
of 26 outputs
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