Conducting clinical trials in lupus presents unique challenges for the investigator. Since reliable data are crucial for precisely evaluating results, strategies must be in place to ensure that outcome assessments are accurate and consistent throughout a study. This paper reviews reliability in clinical research and specifically with lupus outcome measures. Suggested recommendations for ensuring reliability in lupus trials are provided.
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References
1.
Stamler J . The INTERSALT study: background, methods, findings and implications . [published erratum appears in Am J Clin Nutr 1997; 66: 1297]. Am J Clin Nutr1997; 65 (Suppl 2): S626-S642 .
2.
O'Connell MB , Hewitt JM , Lackner TE . Consistency of evaluators assessing inhaler technique . Ann Allergy1991; 67: 603-608 .
3.
Morris AL , Bentley JM , Vito AA . Training and calibrating evaluators for a national private dental office assessment program . J Public Health Dent1987; 47: 165-171 .
4.
Lyden P , Brott T , Tilley B et al. Improved reliability of the NIH stroke scale using video training . Stroke1994; 25: 2220-2226 .
5.
Landis RJ , Kock GG . The measurement of observer agreement for categorical data . Biometrics1977; 33: 159-174 .
6.
Diamond JE , Mueller MJ , Delitto A , Sinacore DR . Reliability of a diabetic foot evaluation . Phys Ther1989; 69: 797-802 .
7.
The Asilomar Working Group on Recommendations for Reporting of Clinical Trials in the Biomedical Literature. Checklist of information for inclusion in reports of clinical trials . Ann Intern Med1966; 124: 741-743 .
8.
Fletcher RH , Fletcher SW , Wagner EH . Clinical Epidemiology. The Essential3rd edn.Baltimore: Williams & Wilkins , 1996.
9.
Cohen J . A coefficient of agreement for nominal scales . Ed Psychol Meas1960; 20: 37-46 .
10.
Thorndike RL , Hagen E . Measurement and Evaluation in Psychology and Eduction. 3rd edn.New York: John Wiley & Sons , 1969.
11.
Strender L-E , Sjoblom A , Sundell K et al. Interexaminer reliability in physical examination of patients with low back pain . Spine1997; 22: 814-820 .
12.
Gray SL , Nance AC , Williams DM , Pulliam CC . Assessment of interrater and intrarater reliability in the evaluation of metered dose inhaler technique . Chest1994; 105: 710-714 .
13.
Bombardier C , Gladman DD , Urowitz MB et al. Derivation of the SLEDAI. A disease activity index for lupus patients . Arthritis Rheum1992; 35: 630-640 .
14.
Liang MH , Socher SA , Larson MG , Schur PH . Reliability and validity of six systems for the clinical assessment of disease activity in systemic lupus erythematosus . Arthritis Rheum1989; 32: 1107-1118 .
15.
Vitali C , Bencivelli W , Isenberg DA et al. Disease activity in systemic lupus erythematosus: report of the consensus study group of the European Workshop for Rheumatology Research: II. Identification of the variables indicative of disease activity and their use in the development of an activity score . Clin Exp Rheumatol1992; 10: 541-547 .
16.
Hay EM , Bacon PA , Gordon C et al. The BILAG index: a reliable and valid instrument for measuring clinical disease activity in systemic lupus erythematosus . QJM1993; 86: 447-458 .
17.
Gladman DD , Ginzler E , Goldsmith C et al. The development and initial validation of the SLICC/ACR damage index for SLE . Arthritis Rheum1996; 39: 363-369 .
18.
Hawker G , Gabriel S , Bombardier C et al. A reliability study of SLEDAI: a disease activity index for systemic lupus erythematosus . J Rheumatol1993; 20: 657-660 .
19.
Gladman D , Urowitz M , Goldsmith C et al The reliability of the Systemic Lupus Erythematosus International Collaborating Clinics/American College of Rheumatology Damage Index in patients with systemic lupus erythematosus . Arthritis Rheum1997; 40: 809-813 .
20.
Strand V , Gladman D , Isenberg D et al. Outcome measures to be used in clinical trials in systemic lupus erythematosus . J Rheumatol1999; 26: 490-497 .
21.
van Vollenhoven RF , Park JL , Genovese MC et al. A double-blind, placebo-controlled, clinical trial of dehydroepidandrosterone in severe systemic lupus erythematosus . Lupus1999; 8: 181-187 .