Table 5

Associations between school physical activity provision and prevalence of overweighta at baseline and follow-up

Males

Females


% (n/N)

PRb

95% CI

PRc

95% CI

% (n/N)

PRc

95% CI

PRb

95% CI


Baseline

Overweight/Obese

Primary School

Low PA School

14 (51/371)

1.0

Ref

1.0

Ref

12 (48/417)

1.0

Ref

1.0

Ref

Med PA School

10 (48/460)

0.76

(0.52–1.11)

0.80

(0.57–1.12)

13 (60/455)

1.15

(0.81–1.61)

1.14

(0.80–1.62)

High PA School

11 (53/503)

0.77

(0.55–1.06)

0.77

(0.56–1.07)

13 (59/472)

1.09

(0.80–1.48)

1.10

(0.83–1.47)

ptrend

0.13

0.14

0.62

0.51

Secondary School

Low PA School

9 (40/440)

1.0

Ref

1.0

Ref

12 (51/442)

1.0

Ref

1.0

Ref

Med PA School

11 (55/485)

1.25

(0.78–1.99)

1.27

(0.86–1.88)

13 (57/456)

1.08

(0.72–1.63)

1.15

(0.80–1.65)

High PA School

11 (68/622)

1.20

(0.82–1.76)

1.14

(0.79–1.64)

13 (69/532)

1.12

(0.80–1.59)

1.15

(0.81–1.64)

ptrend

0.39

0.59

0.50

0.44

Follow-Up

Overweight/Obese

Low PA School

59 (123/208)

1.0

Ref

1.0

Ref

39 (92/239)

1.0

Ref

1.0

Ref

Med PA School

66 (169/254)

1.13

(0.97–1.30)

1.10

(0.97–1.25)

38 (96/250)

1.00

(0.78–1.28)

0.98

(0.79–1.22)

High PA School

63 (182/288)

1.07

(0.93–1.23)

1.08

(0.95–1.23)

41 (110/270)

1.06

(0.83–1.34)

1.04

(0.84–1.28)

ptrend

0.46

0.33

0.63

0.63


a Overweight at baseline defined as a BMI equal to or greater than international age- and sex-specific cutpoints for overweight; overweight at follow-up defined as a BMI≥25 kg/m2.

b PR: prevalence ratios adjusted for the effects of clustering by school.

c PR: prevalence ratios adjusted for the effects of clustering by school plus baseline area-level SES, baseline smoking, baseline parental physical activity; follow-up associations also adjusted for highest level of education, smoking at follow-up, marital status at follow-up and number of live births at follow-up (females only).

Cleland et al. International Journal of Behavioral Nutrition and Physical Activity 2008 5:14   doi:10.1186/1479-5868-5-14

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