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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