A Study to Assess a Direct Physical Measurement Method for Evaluation of Tophus Nodules in Subjects With Gout.
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 13
- 主要终点
- Average Percent Difference in Area Between Visits
研究概览
简要总结
The purpose of this study is to determine the inter- and intra-rater reproducibility of direct physical measurement of tophus nodules in subjects with gout.
详细描述
Gout is a chronic urate crystal deposition disorder. Left untreated, gout may result in progressive disease characterized by joint and bone destruction from tophaceous deposits and renal impairment due to gouty nephropathy. Hyperuricemia, defined as a serum urate concentration greater than 7.0 milligrams per deciliter (mg/dL), is the underlying metabolic aberration leading to urate crystal deposition in gout. Gout has several clinical presentations, including: recurrent acute attacks of inflammatory arthritis; deposition of monosodium urate monohydrate crystals in joints, bones and even parenchymal organs (tophaceous gout); renal impairment; and uric acid nephrolithiasis.1 As serum urate levels increase beyond greater than 7.0 mg/dL, the risks for gouty arthritis or for renal calculi increase.
Febuxostat is a 2-aryl-thiazole derivative chemically engineered as a novel xanthine oxidase/dehydrogenase inhibitor. Febuxostat is being developed as an orally administered agent for the management of hyperuricemia in patients with gout.
Subjects with palpable tophi >10 millimeters (mm) in length and width and as round as possible will have the tophus measured on two separate visits by two different raters to assess the inter- and intra-rater reproducibility of direct physical measurement.
研究设计
- 研究类型
- Observational
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 85 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Must have at least 1 palpable gouty tophus nodule in the foot/ankle, hand/wrist, or elbow, confirmed as gouty by prior diagnosis according to ACR criteria.
- •The tophus must be solid, round, non-tender, intact, and larger than 10mm in both length and width.
- •Joints nearest and immediately adjacent to the selected tophus must not be acutely inflamed.
- •Must be on stable treatment for gout with no medication changes in the past 30 days.
排除标准
- •Must be able to return to the clinical site within 10 days.
- •Must not have allergy to ink.
结局指标
主要结局
Average Percent Difference in Area Between Visits
时间窗: Visit 1 (Day 1) and Visit 2 (Days 6-11)
The rater measured length and width (mm) of the tophus at 2 visits separated by no more than 10 days. Area of the tophus was summarized using average percent difference, calculated as absolute difference of Visits 1 and 2 divided by the average of Visits 1 and 2 for the same tophus, pooled across raters.
Average Percent Difference in Area Between Raters
时间窗: Visit 1 (Day 1 ) and Visit 2 (Day 6-11)
Each rater measured length and width (mm) of the tophus at 2 visits separated by no more than 10 days. Area of the tophus was summarized using the average percent difference, calculated as the absolute difference of Raters 1 and 2 divided by the average of Raters 1 and 2 for the same tophus, pooled across visits.
次要结局
未报告次要终点