Table 6.  Pearson interclass correlation coefficient (ICC) and the corresponding 95% confidence interval (95% CI) between energy expenditure either during school, vacation and whole year periods and both the indirect and direct peak VO2 measurements, by gender and group ages.
     

Indirect VO2

Direct VO2
 

ICC

95% CI

ICC

95% CI

All (N =36)

        

School period (280 days) (kJ·kg-1·day-1)

.54 **

.26-.74

.67 **

.43-.82

Vacations period (85 days) (kJ·kg-1·day-1)

.52 **

.23-.72

.64 **

.40-.80

12- month period (kJ·kg-1·day-1)

.56 **

.28-.75

.69 **

.40-.80

Males (N =18)

            

School period (280 days) (kJ·kg-1·day-1)

.43 *

-.04 -.75

.59 **

.18-.83

Vacations period (85 days) (kJ·kg-1·day-1)

.46 *

-.01-.76

.63 **

.23-.85

12- month period (kJ·kg-1·day-1)

.45 *

-.01-.76

.63 **

.22-.84
Females (N =18)          

School period (280 days) (kJ·kg-1·day-1)

.34

-.15-.69

.57 **

.14-.82

Vacations period (85 days) (kJ·kg-1·day-1)

.37

-.11-.71

.55 **

.11-.81

12- month period (kJ·kg-1·day-1)

.37

-.12-.71

.61 **

.18-.83

(8-10 years) (N =12)

          

School period (280 days) (kJ·kg-1·day-1)

.44 *

-.18-.81

.64 **

.10-.89

Vacations period (85 days) (kJ·kg-1·day-1)

.39 **

-.23-.79

.57 *

.00-.86

12- month period (kJ·kg-1·day-1)

.44*

-.18-.81

.64 **

.10-.89

(11-13 years) (N =12)

          

School period (280 days) (kJ·kg-1·day-1)

.71 **

.23-.91

.69 **

.20-.91

Vacations period (85 days) (kJ·kg-1·day-1)

.78 *

.36-.93

.78 **

.38-.94

12- month period (kJ·kg-1·day-1)

.78 **

.36-.93

.76 **

.34-.93

(14-16 years) (N =12)

          

School period (280 days) (kJ·kg-1·day-1)

.82 **

.46-.95

.89 **

.64-.97

Vacations period (85 days) (kJ·kg-1·day-1)

.73 **

.28-.95

.78 **

.38-.94

12- month period (kJ·kg-1·day-1)

.82 **

.47-.95

.89 **

.64-.97
* p < 0.05 ; ** p < 0.01