Study on measurement of the area of statokinesigram during standing upright. Correlation between the area of body sway and the product of the maximum widths of the sway in both X and Y directions

The area of sway, which is believed to be one of the most important parameters reflecting standing ability, be measured by planimeter. The Japanese Equilibrium Research Association recommends that. On the other hand, the product of the maximum widths in both X and Y directions is also used, since measurement by planimeter is difficult to use clinically. This paper aims to clarify the relationship between two methods. The area measured by plani meter and the product of the maximum widths in both X and Y directions are called A and B, respectively.Statokinesigrams of 500 patients aged 5 to 80 years with eyes open and eyes closed were analyzed and the correlation between A amd B was analyzed statisticaliv.1 ) With regression analysis, the correlation coefficient of A associated with B was determined to be: r=0.953 in the group with eyes open, r=0.968 in the group with eyes closed. Relationships between A and B in both groups were statistically significant at the level of 0.001.2) The data were fitted to the following regression equation: Y=0.443X-20.47 in the group with eyes open, Y=0.441X-5.689 in the group with eyes closed. (X=B, Y=A) The regression coefficients in both groups were significant (P