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Table 1 Description of baseline measurements April-June 2010, study population (adolescents: n = 1348, parents: n = 1348, school managements: n = 14), and response rate

From: SPACE for physical activity - a multicomponent intervention study: study design and baseline findings from a cluster randomized controlled trial

Measurement

Who

What

When

Response rate

Questionnaire

Adolescents

Students filled out an e-survey in a school session with questions about physical activity, health, neighbourhood, school etc.

Duration: 30 minutes. During the week when wearing accelerometer in April-June 2010

97.4%

(n = 1313)

Diaries

Adolescents

Every morning during one week the students filled out a diary with information about active transportation, and use of accelerometer

5 minutes each school day in 1 week (5 weekdays and 2 weekend days) simultaneously with wearing the accelerometer, in April-June 2010

96.6%

(n = 1302)

Physical fitness and anthropometric tests

Adolescents

Students (without health problems) participated in a physical testing session of 11/2 hour including: body measurements (weight, height, waist circumference), running test, agility test, fitness test

Duration 11/2 hour, at the end of the week when wearing accelerometre. April-June 2010

93.9%

(n = 1266)

MTI Actigraph

Adolescents

Students wore an accelerometer (MTI Actigraph,

GT3X) in 7 days. 5 week days and 2 weekend

days

All day in 1 week (5 weekdays and 2 weekend days) in April-June 2010

88.6%*

(n = 1194)

Questionnaire

Parents

One parent (mother or father) completed an e-

survey about parental physical activity and health

behaviour, the neighbourhood etc.

Duration: 15 minutes. In April-June 2010

72.6%

(n = 978)

Questionnaire

School

management

A person from the school management completed

an e-survey about the school social and physical

environment, school politic etc.

Duration: 10 minutes. In April-June 2010

100%

(n = 14)

  1. *Response rate calculated as those wearing accelerometer for at least 9 hours in at least 4 days (time interval 7a m-11 pm. cut out blocks of non wear defined as 20 min of inactivity - consecutive zeroes).