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Table 2 Baseline and follow-up demographic and physiological variables among 30 Girl Scout troops (troop-level means) by treatment group (n = 15 control, n = 15 intervention)

From: Increasing weight-bearing physical activity and calcium-rich foods to promote bone mass gains among 9–11 year old girls: outcomes of the Cal-Girls study

Label

Baseline

Follow-up 1

Follow-up 2

Two-yr Intervention Effect

 

C

I

C

I

C

I

EffectA

SE

Demographics

        

   Girls' race (% white)

90

90

--

--

--

--

--

--

   Family income (% > $90 k)

51

46

--

--

--

--

--

--

   Parent's education (% = college degree)

50

59

--

--

--

--

--

--

   Girls' age (years)

10.5

10.4

11.5

11.4

12.4

12.3

0.04

0.02

Physical Development

        

   Breast Stage 1 (%)

37

47

30

40

1

1

--

--

   Breast Stage 2 (%)

55

51

53

55

24

23

--

--

   Breast Stage 3 (%)

7

2

17

5

44

53

--

--

   Breast Stage 4 (%)

0

0

0

0

21

16

--

--

   Breast Stage 5 (%)

0

0

0

0

10

7

--

--

   Pubic Hair Stage 1 (%)

62

73

23

34

5

7

--

--

   Pubic Hair Stage 2 (%)

24

21

33

33

25

23

--

--

   Pubic Hair Stage 3 (%)

13

6

28

25

29

38

--

--

   Pubic Hair Stage 4 (%)

2

0

15

9

38

31

--

--

   Pubic Hair Stage 5 (%)

0

0

1

0

5

1

--

--

   Menarcheal (% yes)

2

0

14

6

34

35

--

--

Body Size and Composition

        

   Height (cm)

143.5

142.7

149.7

149.2

155.6

155.5

0.77

0.46

   Weight (kg)

40.5

39.5

45.1

44.2

49.9

49.8

0.90

0.75

   BMI (kg/m2)

19.5

19.3

20.0

19.8

20.5

20.5

0.28

0.26

   Fat Mass (%)

26.1

25.4

25.6

25.3

24.7

24.7

0.62

0.57

   Lean Mass (%)

71.2

71.8

71.5

71.9

72.2

72.3

-0.58

0.55

  1. A Net difference between change in intervention and control troop-level means, I = intervention troops; C = Control troops