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Table 2 Key characteristics of studies included in the review

From: A systematic review and meta-analysis of school-based interventions with health education to reduce body mass index in adolescents aged 10 to 19 years

Characteristic

Citations

Proportion of Studies N (% of 33)

N and % with Significant BMI Outcomes

Intervention delivery

 Teachers

[34,35,36,37,38,39, 45, 46, 48,49,50, 52,53,54, 57, 59, 61, 62]

22 (67%)

12 (54%)

 Researchers

[55, 56, 58, 63,64,65]

6 (18%)

2 (33%)

 School Nurse

[44]

1 (3%)

0

 School Project Officer

[43]

1 (3%)

1 (100%)

 Community based instructor

[47, 66]

2 (6%)

0

 Not Stated

[51]

1 (3%)

0

CPD for teachers Provided

[34, 36,37,38,39,40,41,42,43, 45, 48,49,50, 52,53,54, 57, 59, 61]

19 (58%)

12 (63%)

Mode of CPDa

 Textbook/Manual

[37, 39, 50, 52, 54, 57, 59]

7 (21%)

3 (43%)

 Seminars/Workshop

[36, 38, 40,41,42,43, 53, 54, 61]

9 (27%)

6 (67%)

 Training on Intervention Delivery only

[34, 38, 39, 45, 52]

5 (15%)

3 (60%)

 Not stated

[48, 49]

2 (6%)

1 (50%)

Included Parental Involvement

[36, 37, 39, 40, 42, 43, 46, 48, 49, 52,53,54,55,56, 63, 66]

16 (48%)

9 (56%)

Mode of Parental Involvement

 Text messages/ Emails

[37, 46]

2 (6%)

1 (50%)

 Newsletters/Information leaflets

[36, 40, 42, 43, 49, 52, 53, 56]

8 (24%)

5 (63%)

 Family workshops/ Parent Engagement

[39, 48, 54, 55, 63, 66]

6 (18%)

2 (33%)

Engagement componentsb

 App/Website/CD-ROM/ text messages/ social media

[35, 36, 40, 42, 43, 46, 50, 55, 59, 63,64,65,66]

15 (45%)

5 (83%)

 Computer-Tailored Advice

[40, 47, 50, 57, 59]

5 (15%)

1 (20%)

 After-school/out of class

[35, 36, 38, 40,41,42,43,44, 46, 48, 55, 59, 63]

13 (39%)

5 (38%)

 Games

[34, 45]

2 (6%)

1 (50%)

Other Intervention Features

 Environmental modification/ School Policy Change

[37, 39, 40, 42, 46, 48, 49, 52, 59, 61]

10 (30%)

6 (60%)

 Community Programme

[43, 55]

2 (6%)

1 (50%)

 Exercise/ PA classes

[36, 42,43,44, 47, 51,52,53, 56, 58, 63, 66]

12 (36%)

4 (33%)

Study Design

 RCT

[34–36, 38,39,40,41,42, 45,46,47,48, 50, 52,53,54,55,56,57,58,59, 62, 63]

23 (70%)

9 (39%)

 Non-RCT

[37, 41, 43, 49, 51, 60, 61, 64,65,66]

10 (30%)

5 (50%)

Intervention Duration

  < 6 months

[34, 38, 41, 42, 45, 47, 48, 50, 53,54,55,56, 58, 60, 62, 65, 66]

17 (52%)

8 (47%)

 6 months- 1 year

[36, 44, 51, 59, 63]

5 (15%)

0

 1–2 years

[35, 37, 39, 40, 49, 57, 61, 64]

8 (24%)

4 (50%)

  > 2 years

[43, 46, 52]

3 (9%)

2 (67%)

Intervention type

 Health education only

[34, 45, 50, 60, 62, 64, 65]

7 (21%)

2 (29%)

 Multi-component

[35,36,37,38,39,40,41,42,43,44,45, 46,47,48,49, 51,52,53,54,55,56,57,58,59, 61, 63, 66]

26 (79%) [67]

12 (48%)

  1. aTraining on intervention delivery was provided for all interventions. Additional training was also provided for some studies, indicated in the table
  2. bSome studies may include more than one facilitator, delivery mode or intervention strategy
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International Journal of Behavioral Nutrition and Physical Activity

ISSN: 1479-5868

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