Sentence examples for classification of gout from inspiring English sources

Existing criteria for the classification of gout have suboptimal sensitivity and/or specificity, and were developed at a time when advanced imaging was not available.

Key inclusion criteria were: classification of gout as defined by Wallace [ 11], and first attack of gout and/or tophus within the last 10 years.

We aimed to develop a new set of criteria that could be flexible enough to enable accurate classification of gout regardless of MSU status; a clinical-only version can be considered for use in settings in which synovial fluid or tophus aspiration is not feasible.

Accurate classification of gout without crystal documentation for recruitment into studies is also needed, since the majority of cases of gout are managed in primary or acute care settings, 17 18 where synovial fluid aspiration and polarising microscopy are not commonly performed.

Previous studies have, however, shown that a high proportion of self-reported cases of gout meet classification criteria when assessed by physician, hospital discharge diagnosis, or use of gout-specific medication [ 20, 42- 44].

All patients aged 20-89 years with at least 2 claims (either primary care, office visit or emergency room visit) for a diagnosis of gout (International Classification of Diseases 9th Edition (ICD9) 274.xx) between January 1 , 1996and December 31, 2008 were identified from the anonymized database.

The study was open to male and female patients 18 to 70 years of age having a diagnosis of primary gout based on the American Rheumatism Association (1977 ARA preliminary criteria) for the classification of acute arthritis of primary gout [ 36].

The use of self-reported gout probably results in participants without clinical evidence for gout being included in case sample sets; for example, only 69% of men who self-reported as new cases of gout met the ARA classification criteria for gout [ 21], and reliability and sensitivity for self-reported gout have been estimated at 63 to 73%and84%4%, respectively [ 22].

Only three of 29 studies based the diagnosis of gout on validated clinical classification criteria: two studies [ 39, 42] used the American Rheumatism Association criteria [ 50], and one study [ 34] used the New York and Rome criteria [ 51, 52].

The presence of MSU crystals in a symptomatic joint/bursa (ie, synovial fluid) or in a tophus is a sufficient criterion for classification of the subject as having gout, and does not require further scoring.

To identify factors to be considered for the content of classification criteria for gout, three studies were undertaken (figure 1).