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Journal of the Korean Academy of Rehabilitation Medicine 2000;24(2):287-294.
New Instrument to Measure the Stiffness of the Finger Joints; StifMeter.
Kang, Yoon Kyoo , Hahn, Myung Su , Song, Gwan Gyu
1Department of Rehabilitation Medicine, Korea University College of Medicine.
2Department of Medicine, Korea University College of Medicine, Seoul, Korea.
수지의 뻣뻣함을 측정하는 기구(StifMeter)에 대한 연구
강윤규, 한명수, 송관규1
고려대학교 의과대학 재활의학교실, 1내과학교실
Abstract

Objective
To examine the stiffness of finger joints with StifMeter among the patients with rheumatoid arthritis and to calculate the absolute value of the stiffness with a unit of power and to compare the values of the StifMeter with visual analog scale about stiffness (VASstiff).


Method
Subjects were 53 rheumatoid arthritis patients (male 8, female 45) with disease duration at least 6 months. StifMeter was made up of 10 graded springs of a same spring-constant. Stiffness and pain by VAS and StifMeter, finger circumference and pinch strength were measured at outpatient clinic as well as questionaire, prospectively. Laboratory data were reviewed from medical records to verify the state of disease. We compared StifMeter with VASstiff and VASpain.


Results
Mean score of StifMeter was 5.59 on the right side and 5.53 on the left. The corrected values of the StifMeter with a unit of power were 0.01684 on the right side and 0.01672 on the left side. VASstiff score was positively correlated with that of StifMeter. The older the age, the higher the score of VASstiff that was positively correlated with that of StifMeter. The longer the duration of disease, the higher the score of VASstiff that was positively correlated with that of StifMeter.


Conclusion
StifMeter is a semi-objective method which may be of value in the measurement of finger joint stiffness.

Key Words: Semi-objective measure, StifMeter, Rheumatoid arthritis, Stiffness, Semi-objective measure, VAS, StifMeter
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