Table 2.

Reliability analysis (test–retest) of the SAYCARE sedentary behavior questionnaire

Children (N=55)

Week days

Weekend days

Total days

Q1

Q2

rho

ka

Q1

Q2

rho

ka

Q1

Q2

rho

ka

Total SB time (min/day)

66.1 (41.0 to 96.0)

58.5 (46.3 to 112.6)

0.45*

0.55**

200.0 (135.0 to 285.0)

180.0 (120.0 to 240.0)

0.51**

0.40*

110.5 (74.0 to 154.3)

120.0 (75.0 to 142.1)

0.70**

0.53**

Meeting ≤120min/day (%)

85.8

75.9

0.52b, *

15.8

15.9

0.83b, *

42.2

47.7

0.63b, *

Adolescents (n=106)

Week days

Weekend days

Total days

Q1

Q2

rho

ka

Q1

Q2

rho

ka

Q1

Q2

rho

ka

Total SB time (min/day)

102.0 (63.4 to 165.9)

54.7 (18.7 to 96.7)

0.39*

0.13

180.0 (96.4 to 260.0)

90.1 (18.8 to 186.0)

0.34**

0.27**

131.1 (97.1 to 178.2)

74.9 (27.4 to 127.0)

0.50**

0.28**

Meeting ≤120min/day (%)

55.4

84.6

0.15b, *

31.8

84.5

0.08b, *

40.1

73.1

0.17b, *

Values are median (25^th–75^th percentile); k kappa agreement, Q1 Questionnaire first application, Q2 Questionnaire second application, rho Spearman correlation coefficient, SB sedentary behavior

Moderate (or above) values of spearman correlation (rho ≥ 0.30) and kappa agreement (k ≥ 0.40) are in bold

^aweighted (quadratic) Cohen’s kappa-coefficient for quartiles comparison;

^bCohen’s kappa coefficient for binary data;

*p ≤0.05

**p ≤0.01