The Speed Calculated Hand Activity Level (HAL) Matches Observer Estimates Better Than the Frequency Calculated HAL

摘要

Hand Activity Level (HAL) can be estimated from observations (HAL_o), calculated from exertion frequency, F and duty cycle D (HAL_F) or from speed, S and D (HAL_s). Data collected by prospective cohort studies were used to compare these methods. There was 75% agreement between HAL_o and HAL_s (HAL_s= 1.02 x HAL_o -0.2, R~2= 0.78, F(1,1003)= 43665, p < .001), but only 30% agreement between HAL_o and HAL_F (HAL_F= 0.21 x HAL_o + 2.2, R~2= 0.04, F(1,1003)= 71.71, p < .001). HAL_s was more consistent with HAL_o since both are dependent on speed, and because HAL_s can be automated, it is more objective than HAL_F or HAL_o in this sample.