Drummy 2016.
| Study characteristics | ||
| Methods | Study design: cluster‐RCT | |
| Participants |
School inclusion criteria: convenience sample of primary schools School exclusion criteria: — Student inclusion criteria: students aged 9 and 10 Student exclusion criteria: — Setting: school Age group: children Gender distribution: females and males Country/Countries where trial was performed: Northern Ireland |
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| Interventions |
Intervention: teachers in the intervention group were asked to lead a 5‐minute activity break 3 times/d for 12 weeks. The activity break began with gentle jogging on the spot as a warm‐up for less than 1 minute, followed by moderate to vigorous intensity exercises such as hopping, jumping, and running on the spot, scissor kicks, etc. Teachers could select which exercises to include in each activity break. They were encouraged to vary activities each day. Children participated in the activity break in the classroom beside their desks Comparator: control groups continued with their normal daily routine throughout the 12‐week period Duration of intervention: 12 weeks Duration of follow‐up: 12 weeks Number of schools: 7 Theoretical framework: — |
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| Outcomes | PA duration BMI |
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| Study registration | — | |
| Publication details |
Language of publication: English Funding: — Publication status: peer‐reviewed journal |
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| Stated aim for study | "Thus, the present study examined the effect of a classroom‐based activity break on accelerometer‐determined MVPA and anthropometric variables in a sample of children attending primary schools in Northern Ireland" | |
| Notes | ||
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | High risk | Comment: stratified by rural/urban location and given alternate numbers by researcher [author communication] |
| Allocation concealment (selection bias) | Unclear risk | Comment: concealed from participants but investigator could have foreseen assignment [author communication] |
| Blinding of participants and personnel (performance bias) All outcomes | High risk | Comment: participants could not be blinded |
| Blinding of outcome assessment (detection bias) All outcomes | High risk | Comment: no blinding [author communication] |
| Incomplete outcome data (attrition bias) Anthropometrics, Fitness | High risk | Comment: > 10% loss to follow‐up; reasons not collected [author communication] |
| Incomplete outcome data (attrition bias) Physical activity and sedentary time | High risk | Comment: > 10% loss to follow‐up; reasons not collected [author communication] |
| Selective reporting (reporting bias) | Unclear risk | Comment: no protocol; appears all outcomes reported |
| Cluster RCT ‐ Recruitment bias | High risk | Comment: baseline data collected after randomisation |
| Cluster RCT ‐ Baseline imbalance | Low risk | Comment: no baseline differences |
| Cluster RCT ‐ Loss of clusters | Low risk | Comment: no clusters lost |
| Cluster RCT ‐ Incorrect analysis | High risk | Comment: clustering not accounted for in analysis |