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Table 3 Within- and between-person variance and week-to-week reliability of habitual physical activity, total (N = 48)

From: Variability and reliability study of overall physical activity and activity intensity levels using 24 h-accelerometry-assessed data

    Percent of total variance   
PA parametera week 1 week 2 within-person variance between-person variance ICC between week 1 and 2
  GM GM sw2 sb2 ICC 95% CI
Overall PA, cpm 438.0 421.3 25.3 74.7 0.75 0.60, 0.85
Time in inactivity, min/d 1186.0 1192.1 25.3 74.7 0.76 0.61, 0.86
Time in low intensity activity, min/d 127.2 124.3 25.0 75.0 0.78 0.64, 0.87
Time in moderate activity, min/d 96.2 91.9 33.3 66.7 0.68 0.49, 0.80
Time in vigorous activity, min/d 14.0 13.8 18.2 81.8 0.82 0.70, 0.89
Time in very vigorous activity, min/d 3.7 3.4 32.0 68.0 0.69 0.51, 0.81
  1. cpm counts per minute, ICC intraclass correlation coefficient, GM geometric mean, PA physical activity, s b 2 between-person variance of physical activity between week 1 and 2, s w 2 within-person variance of physical activity between week 1 and 2, 95% CI 95% confidence interval
  2. aall analyses were performed using log-transformed data