Table 2

Multilevel regression analysis for steps/day, and minutes of MVPA

Steps/day±

MVPAtotal (mins/day) ±

MVPAbout (mins/day) ±


β

CI*

β

CI

β

CI


Constant

11281.5

10641.3, 11921.6

126.2

119.2, 133.2

44.9

40.0, 49.8

Gender¥

-1260.6

-1824.2, -696.9

-18.0

-24.5, -11.5

-18.0

-22.5, -13.6

Group**

-1434.6

-2223.6, -645.6

3.3

-4.1, 10.7

5.4

-0.1, 11.0

Time in study (months)

93.8

59.3, 128.4

.23

-0.2, 0.6

0.3

0.1, 0.5

Group × time in study (month)

23.6

-8.5, 55.7

.35

-0.1,0.7

0.1

-0.1, 0.4

Age

377.5

52.6, 702.4

-5.6

-9.2, -1.9

n/a

School 1

1172.9

1093.5, 1252.2

n/a

n/a

School 2

1996.4

1014.8, 2977.9

n/a

n/a

School 6

n/a

n/a

7.181

1.3, 13.1


Random parts

variance

CI

variance

CI

variance

CI


Level 2 (Between individuals)

3486392.8

1942487, 5030299

282.7

139.2, 426.3

89.9

15.3, 164.4


Level 1 (Within individuals)

7545611.0

6077926, 9013296

395.8

273.1, 518.6

247.7

172.8, 322.5


Notes:± The inclusion of SES did not improve the fit of the model and it was therefore not included.

*CI = 95% confidence interval; with level 2 variation (Between individuals) and with level 1 variation (within individuals or repeated measures)

= significant at p < 0.05;¥ Reference category = boys; ** reference category = control.

Gorely et al. International Journal of Behavioral Nutrition and Physical Activity 2011 8:74   doi:10.1186/1479-5868-8-74

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