• 1
    Gladman DD. Prognosis and treatment of systemic lupus erythematosus [review]. Curr Opin Rheumatol 1996; 8: 4307.
  • 2
    Thumboo J, Fong KY, Ng TP, Leong KH, Feng PH, Thio ST, et al. Validation of the MOS SF-36 for quality of life assessment of patients with systemic lupus erythematosus in Singapore. J Rheumatol 1999; 26: 97102.
  • 3
    Thumboo J, Fong KY, Chan SP, Machin D, Feng PH, Thio ST, et al. The equivalence of English and Chinese SF-36 versions in bilingual Singapore Chinese. Qual Life Res 2002; 11: 495503.
  • 4
    Bindee K, Gladman DD, Ibanez D, Urowitz MB. Quality of life over time in patients with systemic lupus erythematosus (SLE) [abstract]. Arthritis Rheum 2005; 52 Suppl 9: S187.
  • 5
    Leong KP, Kong KO, Thong BY, Koh ET, Lian TY, Teh CL, et al. Psychometric properties of a new systemic lupus erythematosus-specific quality-of-life instrument (SLEQOL). Ann Acad Med Singapore 2004; 33 Suppl 5: S357.
  • 6
    Leong KP, Kong KO, Thong BY, Koh ET, Lian TY, Teh CL, et al. Development and preliminary validation of a systemic lupus erythematosus-specific quality-of-life instrument (SLEQOL). Rheumatology (Oxford) 2005; 44: 126776.
  • 7
    Koh ET, Seow A, Pong LY, Koh WH, Chan L, Howe HS, et al. Cross cultural adaptation and validation of the Chinese Health Assessment Questionnaire for use in rheumatoid arthritis. J Rheumatol 1998; 25: 17058.
  • 8
    Leung KF, Tay M, Cheng SS, Lin F. Hong Kong Chinese version of World Health Organization Quality of Life measure: abbreviated version WHOQOL–BREF (HK). Hong Kong: Hong Kong Hospital Authority; 1997.
  • 9
    Kaslow RA. High rate of death caused by systemic lupus erythematosus among US residents of Asian descent. Arthritis Rheum 1982; 25: 4148.
  • 10
    Serdula MK, Rhoads GG. Frequency of systemic lupus erythematosus in different ethnic groups in Hawaii. Arthritis Rheum 1979; 22: 32833.
  • 11
    Guillemin F, Bombardier C, Beaton D. Cross-cultural adaptation of health-related quality of life measures: literature review and proposed guidelines. J Clin Epidemiol 1993; 46: 141732.
  • 12
    Beaton DE, Bombardier C, Guillemin F, Ferraz MB. Guidelines for the process of cross-cultural adaptation of self-report measures [review]. Spine 2000; 25: 318691.
  • 13
    Hochberg MC. Updating the American College of Rheumatology revised criteria for the classification of systemic lupus erythematosus [letter]. Arthritis Rheum 1997; 40: 1725.
  • 14
    Bae SC, Koh HK, Chang DK, Kim MH, Park JK, Kim SY. Reliability and validity of systemic lupus activity measure-revised (SLAM-R) for measuring clinical disease activity in systemic lupus erythematosus. Lupus 2001; 10: 4059.
  • 15
    Gladman D, Ginzler E, Goldsmith C, Fortin P, Liang M, Urowitz M, et al. The development and initial validation of the Systemic Lupus International Collaborating Clinics/American College of Rheumatology damage index for systemic lupus erythematosus. Arthritis Rheum 1996; 39: 3639.
  • 16
    Raymond G. Ethnologue: languages of the world. 15th ed. Dallas (TX): SIL International; 2005.
  • 17
    Ren XS, Amick B 3rd, Zhou L, Gandek B. Translation and psychometric evaluation of a Chinese version of the SF-36 Health Survey in the United States. J Clin Epidemiol 1998; 51: 112938.
  • 18
    Schmidt S, Bullinger M. Current issues in cross-cultural quality of life instrument development [review]. Arch Phys Med Rehabil 2003; 84 Suppl 2: S2934.
  • 19
    Bowden A, Fox-Rushby JA. A systematic and critical review of the process of translation and adaptation of generic health-related quality of life measures in Africa, Asia, Eastern Europe, the Middle East, South America. Soc Sci Med 2003; 57: 1289306.
  • 20
    Crane PK, van Belle G, Larson EB. Test bias in a cognitive test: differential item functioning in the CASI. Stat Med 2004; 23: 24156.
  • 21
    Zumbo BD. A handbook on the theory and methods of differential item functioning (DIF): logistic regression modeling as a unitary framework for binary and Likert-type (ordinal) item scores. Ottawa: Directorate of Human Resources Research and Evaluation, Department of National Defense; 1999.
  • 22
    Bjorner JB, Kreiner S, Ware JE, Damsgaard MT, Bech P. Differential item functioning in the Danish translation of the SF-36. J Clin Epidemiol 1998; 51: 1189202.
  • 23
    Lai JS, Teresi J, Gershon R. Procedures for the analysis of differential item functioning (DIF) for small sample sizes. Eval Health Prof 2005; 28: 28394.
  • 24
    Herdman M, Fox-Rushby J, Badia X. A model of equivalence in the cultural adaptation of HRQoL instruments: the universalist approach. Qual Life Res 1998; 7: 32335.
  • 25
    Wild D, Grove A, Martin M, Eremenco S, McElroy S, Verjee-Lorenz A, et al. Principles of good practice for the translation and cultural adaptation process for Patient-Reported Outcomes (PRO) Measures: report of the ISPOR task force for translation and cultural adaptation. Value Health 2005; 8: 94104.