PT  - JOURNAL ARTICLE
AU  - Landewé, R
AU  - van der Heijde, D
TI  - Presentation and analysis of radiographic data in clinical trials and observational studies
AID  - 10.1136/ard.2005.042572
DP  - 2005 Nov 01
TA  - Annals of the Rheumatic Diseases
PG  - iv48--iv51
VI  - 64
IP  - suppl 4
4099  - http://ard.bmj.com/content/64/suppl_4/iv48.short
4100  - http://ard.bmj.com/content/64/suppl_4/iv48.full
SO  - Ann Rheum Dis2005 Nov 01; 64
AB  - Despite the advent of sophisticated imaging systems, plain radiography continues to be a valuable outcome variable in clinical trials of inflammatory disorders for a number of reasons. This paper discusses the pros and cons of the different ways in which radiographic data in trials is presented; the minimum time needed to demonstrate radiographic progression in the context of a clinical trial; and the best ways to statistically analyse radiographic data.