Vázquez-Abad D, Pineda C, Martínez-Lavín M
Rheumatology Service, Instituto Nacional de Cardiología, Ignacio Chávez, México, DF.
J Rheumatol. 1989 Apr;16(4):518-20.
We describe a simple method that defines with numbers the drumstick deformity of the digits. We measured 2 circumferences on each of the 10 fingers at the nail bed (NB) and at the distal interphalangeal joint (DIP), the sum of the 10 ratios NB:DIP was termed Digital Index. Intraobserver variation of the Digital Index was small, with a Pearson's correlation coefficient of R = 0.979; interobserver variation was also not significant (R = 0.999). Making use of this Digital Index, we studied 22 patients with digital clubbing associated with cyanotic congenital heart disease and 66 healthy controls. Digital Index clearly separated patients from controls, 10.73 +/- 0.32 vs 9.33 +/- 0.27 (means +/- SD). The Index was independent of age or sex. Patients with hypertrophic osteoarthropathy had significantly higher indices than patients with clubbing alone.
我们描述了一种用数字定义手指杵状指畸形的简单方法。我们在10根手指的甲床（NB）和远侧指间关节（DIP）处分别测量了2个周长，10个NB:DIP比值之和称为数字指数。数字指数的观察者内变异很小，Pearson相关系数R = 0.979；观察者间变异也不显著（R = 0.999）。利用这个数字指数，我们研究了22例与青紫型先天性心脏病相关的杵状指患者和66名健康对照者。数字指数能清晰地将患者与对照者区分开，分别为10.73±0.32和9.33±0.27（均值±标准差）。该指数与年龄或性别无关。肥厚性骨关节病患者的指数显著高于单纯杵状指患者。
