抄録
We investigated the relationship between Pinch strength and factors associated with activity of Rheumatoid Arthritis (RA). Subjects included 183 out-patients (366 hands) with RA who were hospitalized from April to June 1996 for at least one year. Pinch gauge (Baseline) which measures 0-5kg strength, and also grip strength were measured with an air bag connected to a mercurial column. 366 hands were assessed according to the classifications of Steinbrocker, Larsen, and Naelbuff. Results revealed that pinch strength correlated with grip strength. (Rt.: p<0.0001, Lt.: p<0.0001) However pinch strength did not correlate with patient's age, disease duration, morning stiffness, and ESR. Pinch strength measurement with a pinch gauge was useful for evaluating RA activity. It was difficult to measure grip strength in patients with advanced RA. It was useful to measure the pinch strength in patients with severe joint mutilation or immediately postoperatively.
