PURPOSE: To assess the validity and reliability of the Malay version of the Quality of Life (QOL) Questionnaire of the European Foundation for Osteoporosis (QUALEFFO-41) in Malaysia. METHODS: The QUALEFFO-41 was translated from English to Malay and administered to 215 post-menopausal osteoporotic women ≥50 years who could understand Malay, at baseline and 4 weeks. The SF-36 was administered at baseline to assess convergent validity. To assess discriminative validity, patients with and without back pain were recruited. RESULTS: Confirmatory factor analysis showed that the QUALEFFO-41 had five domains. Good internal consistency was seen in all domains (0.752-0.925) except for the social activity domain (0.692). Test-retest reliability showed adequate correlation for all items (0.752-0.964, p < 0.001). Patients with back pain had significantly worse QOL compared with those without (back pain = 42.2 ± 10.9, no back pain = 33.3 ± 8.9; p < 0.001). The total QUALEFFO-41 score and the SF-36 physical and mental composite scores were significantly correlated (-0.636 and -0.529, p < 0.001, respectively). CONCLUSIONS: The Malay version of the QUALEFFO-41 was found to be a reliable and valid instrument to evaluate the QOL of osteoporotic patients in Malaysia. To enable the QUALEFFO-41 to be used in a multiracial population, further studies should look into validating other versions of the QUALEFFO-41 in Malaysia.
PURPOSE: To assess the validity and reliability of the Malay version of the Quality of Life (QOL) Questionnaire of the European Foundation for Osteoporosis (QUALEFFO-41) in Malaysia. METHODS: The QUALEFFO-41 was translated from English to Malay and administered to 215 post-menopausal osteoporoticwomen ≥50 years who could understand Malay, at baseline and 4 weeks. The SF-36 was administered at baseline to assess convergent validity. To assess discriminative validity, patients with and without back pain were recruited. RESULTS: Confirmatory factor analysis showed that the QUALEFFO-41 had five domains. Good internal consistency was seen in all domains (0.752-0.925) except for the social activity domain (0.692). Test-retest reliability showed adequate correlation for all items (0.752-0.964, p < 0.001). Patients with back pain had significantly worse QOL compared with those without (back pain = 42.2 ± 10.9, no back pain = 33.3 ± 8.9; p < 0.001). The total QUALEFFO-41 score and the SF-36 physical and mental composite scores were significantly correlated (-0.636 and -0.529, p < 0.001, respectively). CONCLUSIONS: The Malay version of the QUALEFFO-41 was found to be a reliable and valid instrument to evaluate the QOL of osteoporoticpatients in Malaysia. To enable the QUALEFFO-41 to be used in a multiracial population, further studies should look into validating other versions of the QUALEFFO-41 in Malaysia.
Authors: D J Cook; G H Guyatt; J D Adachi; R S Epstein; E F Juniper; P A Austin; J Clifton; C J Rosen; C R Kessenich; J L Stock; J Overdorf; P D Miller; A L Erickson; M R McCLung; B L McClung; L E Griffith; G Ioannidis Journal: Osteoporos Int Date: 1999 Impact factor: 4.507
Authors: E Helmes; A Hodsman; D Lazowski; A Bhardwaj; R Crilly; P Nichol; D Drost; L Vanderburgh; L Pederson Journal: J Gerontol A Biol Sci Med Sci Date: 1995-03 Impact factor: 6.053
Authors: Cynthia L Leibson; Anna N A Tosteson; Sherine E Gabriel; Jeanine E Ransom; L Joseph Melton Journal: J Am Geriatr Soc Date: 2002-10 Impact factor: 5.562
Authors: Jonathan D Adachi; George Ioannidis; Wojciech P Olszynski; Jacques P Brown; David A Hanley; Rolf J Sebaldt; Annie Petrie; Alan Tenenhouse; Gregory F Stephenson; Alexandra Papaioannou; Gordon H Guyatt; Charlie H Goldsmith Journal: BMC Musculoskelet Disord Date: 2002-04-22 Impact factor: 2.362