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Table 5 Baseline characteristics of pupils at intervention-and control schools: socio-demographics and primary outcome measures (significant differences are highlighted in bold, p < 0.05)

From: The Boost study: design of a school- and community-based randomised trial to promote fruit and vegetable consumption among teenagers

 

Intervention sample (N = 1,121)

Control sample (N = 1,035)

 

Sociodemographics

Percentage (N) of pupils reporting the given characteristic

N Missing

Percentage (N) of pupils reporting the given characteristic

N Missing

P-value from chi-square test or t-test

Boys

51.8% (581)

0

51.9% (537)

0

p = 0.980

Mother is unemployed*

12.0% (134)

6

10.5% (108)

1

p = 0.169

Father is unemployed*

6.8% (73)

6

5.3% (53)

1

p = 0.237

Mothers' SEP*

26.7% (295)

6

27.9% (286)

2

p = 0.198

High (I + II)

26.7% (295)

 

29.9% (307)

  

Medium (III + IV)

23.9% (264)

 

21.8% (223)

  

Low (V + 7)

22.7% (251)

 

20.4% (209)

  

Other (6 + 8)

     

Fathers' SEP*

20.1% (218)

6

18.9% (189)

2

p = 0.319

High (I + II)

37.8% (411)

 

41.4% (415)

  

Medium (III + IV)

18.9% (205)

 

16.7% (167)

  

Low (V + 7)

23.2% (252)

 

23.0% (230)

  

Other (6 + 8)

     

Pupil was born in Denmark

95.1% (1060)

6

95.0% (983)

0

p = 0.988

Mother was born in Denmark

83.4% (930)

6

86.1% (891)

0

p = 0.035

Father was born in Denmark

84.1% (938)

6

88.3% (914)

0

p = 0.006

Speaking Danish at home

95.7% (1068)

6

96.2% (996)

0

p = 0.597

Primary outcomes

     

Mean FJ intake (SD)**

232.3 g/day (197.3)

3

226.3 g/day (195.8)

0

p = 0.512

Mean V intake (SD)**

129.5 g/day (158.0)

3

142.1 g/day (165.5)

0

p = 0.094

Mean FJV intake (SD)**

361.8 g/day (262.4)

3

368.4 g/day (262.7)

0

p = 0.588

Meeting WHO guidelines of eating ≥ 400 g of FJV daily (24-hour recall)**

40.7% (395)

3

43.5% (395)

0

p = 0.818

Meeting national guidelines of eating ≥ 600 g of FJV daily (24-hour recall)**

21.1% (205)

3

22.1% (201)

0

p = 0.670

Eating F daily (FFQ)

48.2% (538)

5

48.5% (502)

0

p = 0.891

Eating raw V daily (FFQ)

20.3% (227)

5

21.5% (223)

0

p = 0.492

Eating cooked V daily (FFQ)

6.3% (70)

5

5.7% (59)

0

p = 0.577

  1. Abbreviations: FJ = fruit including maximum one portion of 100% natural juice, FJV = fruit including maximum one portion of 100% natural juice plus vegetables, FV = fruit and vegetables, SEP = socioeconomic position, V = vegetables. * Exclusion of pupils who do not have/see mother or father, N = 79 (Intervention sample: mother: N = 10, father: N = 29. Control sample: mother: N = 8, father: N = 32). ** Exclusion of over-eaters defined as pupils eating > 1,000 gram FJV. N over-eaters = 274 (Intervention sample: N = 148, control sample: N = 126).
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BMC Public Health

ISSN: 1471-2458

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