Table 2

Baseline demographic characteristics and outcome measures of Girls in Sport participants

Intervention Group(1)

Control Group(0)

P

All

Age in years, mean (SE)

13.71 ± 0.04

13.48 ± 0.02

0.3512

13.60 ± 0.02

Physical activity* (n = 1199)

Counts per minute, mean (SE)

428.40 ± 5.50

418.44 ± 5.22

0.2367

423.14 ± 3.79

Percentage time sedentary intensity

60.07 ± 0.32

61.22 ± 0.28

0.1210

60.83 ± 0.21

Percentage time light intensity

34.95 ± 0.27

33.95 ± 0.24

0.0655

34.26 ± 0.19

Percentage time moderate intensity

4.51 ± 0.08

4.32 ± 0.08

0.1482

4.38 ± 0.06

Percentage time vigorous intensity

0.455 ± 0.02

0.512 ± 0.02

0.6826

0.476 ± 0.01

Percentage time moderate-to-vigorous activity

4.97 ± 0.09

4.83 ± 0.09

0.3184

4.86 ± 0.06

Percentage of participants meeting recommended 60 mins of MVPA every day

1.9

1.1

0.253

1.5

Percentage of participants meeting recommended 60 mins of MVPA per day on average

10.6

9.6

0.682

10.1

Physical self-worth (n = 1467)

16.04 ± 0.14

16.40 ± 0.14

0.1798

16.22 ± 0.10

Sports competence (n = 1465)

15.42 ± 0.14

15.70 ± 0.13

0.2739

15.56 ± 0.10

Physical condition (n = 1468)

16.04 ± 0.14

16.38 ± 0.14

0.1389

16.21 ± 0.10

Body attractiveness (n = 1462)

14.02 ± 0.14

14.39 ± 0.15

0.2748

14.21 ± 0.10

Physical strength (n = 1461)

15.09 ± 0.13

15.35 ± 0.12

0.2002

15.22 ± 0.09

Physical activity confidence (n = 1510)

29.74 ± 0.16

29.88 ± 0.17

0.4675

29.81 ± 0.12

Enjoyment of physical activity (n = 1503)

29.77 ± 0.16

29.63 ± 0.16

0.5504

29.70 ± 0.12

Enjoyment of school sport (n = 1510)

28.06 ± 0.19

27.40 ± 0.20

0.0641

27.74 ± 0.14

Social support for physical activity (n = 1510)

12.54 ± 0.10

12.02 ± 0.11

0.0768

12.29 ± 0.08

Social support during school sport (n = 1503)

23.83 ± 0.16

23.65 ± 0.16

0.6594

23.75 ± 0.11

Strategies to increase physical activity (n = 1509)

25.32 ± 0.18

24.93 ± 0.19

0.3935

25.13 ± 0.13

School physical activity environment (n = 1508)

26.26 ± 0.16

25.88 ± 0.16

0.6952

26.07 ± 0.11

Perceived importance of physical activity (n = 1459)

22.42 ± 0.15

22.39 ± 0.15

0.8685

22.41 ± 0.11

Raw means are presented. Analysed intervention and control means and se are adjusted LS estimates from the PROC MIXED procedure in SAS V 9.2. The model used specifies randomisation group and pairing in the class statement as recommended by Murray [32]. Degrees of freedom are entered manually using the formula (randomisation groups-1)x(pairs-1) and in this study is equal to 11. Only those subjects who completed the specified questionnaire subdomains are included in this table with the numbers indicated in brackets (n). *accelerometer estimates include accelerometer type in the model.

Okely et al. BMC Public Health 2011 11:658   doi:10.1186/1471-2458-11-658