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Table 2 Performance variability of activity monitoring in the free living environment

From: Variability of total step activity in children with cerebral palsy: influence of definition of a day on participant retention within the study

  Number of children Variability of 2 days of monitoring (ICC) Predicted number of days of monitoring required to achieve an ICC of
  0.7 0.8 0.9
>100 steps per 24 h period 61 0.620 2.8 days 4.9 days 11 days
≥10 h per 24 h period 55 0.765 1.4 days 2.5 days 5.5 days
  1. ICC intra class correlation coefficient