The relation between the minimally important difference and patient benefit

COPD: Journal of Chronic Obstructive Pulmonary Disease

Volumn 2, Issue 1, 2005, Pages 69-73

  Norman, Geoffrey R ^a  

^a MCMASTER UNIVERSITY   (Canada)

Author keywords

Health related quality of life; MID; NNT

Indexed keywords

ASTHMA; CONFERENCE PAPER; EFFECT SIZE; HEALTH CARE QUALITY; HUMAN; LINEAR SYSTEM; MINIMALLY IMPORTANT DIFFERENCE; PREDICTION; PRIORITY JOURNAL; RESPIRATORY TRACT DISEASE; RISK BENEFIT ANALYSIS; SIMULATION; STATISTICAL ANALYSIS; STATISTICAL MODEL; TREATMENT OUTCOME;

DATA INTERPRETATION, STATISTICAL; HUMANS; QUALITY OF LIFE; SAMPLE SIZE; TREATMENT OUTCOME;

EID: 20144384492     PISSN: 15412555     EISSN: 15412563     Source Type: Journal    
DOI: 10.1081/COPD-200051249     Document Type: Conference Paper

References (13)

1. Jaeschke R, Singer J, Guyatt G. Measurement of health status. Ascertaining the minimally important difference. Control Clin Trials 1989; 10(4):407-415.
2. Norman GR, Gwadry-Sridhar F, Guyatt GH, Walter SD. Relation of distribution- and anchor-based approaches to the interpretation of changes in health-related quality of life. Med Care 2001; 39(10):1039-1047.
3. Norman GR, Wyrwich KW, Sloan JA. Interpretation of changes in health-related quality of life: the remarkable universality of half a standard deviation. Med Care 2003; 41(5):582-592.
4. Cohen J. Statistical Power Analysis for the Behavioural Sciences. London, England: Academic Press, 1969.
5. Guyatt GH, Juniper ED, Walter SD, Feeny DH, Patrick DL. Measuring health-related quality of life. Ann Inter Med 1993; 118(8):622-629.
6. Miller GA. The magic number seven. Plus or minus two: some limits on our capacity for processing information. Psycholanal Rev 1956; 63(2):81-97.
7. Guyatt GH, Juniper EF, Walter SD, Griffith LE, Goldstein RS. Interpreting treatment effects in randomised trials. Br Med J 1998; 316(7132):690-693.
8. Guel LR, Casan P, Sangenis M, Morante F, Belda J, Guyatt GH. Quality of life in patients with chronic respiratory disease: the Spanish version of the Chronic Respiratory Questionnaire. Eur Respir J 1998; 11(1):55-60.
9. Wijkstra PJ, Ten Vergert EM, van Altena R, Otten V, Kraan J, Postma DS, Koeter GH. Long term benefits of rehabilitation at home on quality of life and exercise tolerance in patients with chronic obstructive pulmonary disease. Thorax 1995; 50(8):824-828.
10. Goldstein RS, Gort EH, Guyatt GH, Stubbing D, Avendano MA. Prospective randomized controlled trial of respiratory rehabilitation. Lancet 1994; 344:1394-1397.
11. Norman GR, Stratford PW, Regehr G. Methodological problems in the retrospective computation of responsiveness to change: the lesson of Cronbach. J Clin Epidemiol 1997; 50(8):869-879.
12. Senn S. Random results from randomised trials (Letter). Br Med J 1998; 316:690-693.
13. Guyatt GH, Juniper EF, Goldstein RS. N of 1 trials are needed. Br Med J 1998; 317:537 (Letter).