Salmon 2011a.

Methods	Type of trial: effectiveness Allocation: cluster‐randomised Intervention model: factorial Masking: −
Participants	Estimated number of schools: 20 Estimated number of participants: 600 Inclusion criteria: primary schools within a 50‐km radius of Melbourne with enrolment of over 300 students Exclusion criteria: − Inclusion criteria: Year 3 children Exclusion criteria: −
Interventions	Intervention 1: SB‐I, reducing uninterrupted time spent sitting during school hours will be aimed for in the school setting; and reducing overall sitting time and discretionary screen‐based behaviours (i.e. television viewing, computer use, and electronic games) will be aimed for in the family setting Intervention 2: PA‐I, physical activity intervention arm ‐ increasing or maintaining moderate‐ to vigorous‐intensity physical activity (e.g. active play, organised and non‐organised games) during recess and lunch breaks will be targeted in the school setting, and time spent outdoors will be targeted in the family setting Intervention 3: SB + PA‐I, combined sedentary behaviour and physical activity intervention arm ‐ a blended version of the 2 interventions, but with the same intervention ‘dose’. For example, when children in this arm complete a behavioural contract to switch off the television, they will be encouraged to participate in physical activity (SB‐I children will not be directly encouraged to participate in activity when they switch off their television). The combined intervention arm will include 18 class lessons (9 per year), standing lessons and interruptions to children’s classroom sitting time (short breaks), promotion of physical activity during recess and lunch breaks, and 18 newsletters to parents Comparator: asked to continue usual lesson delivery; will receive all intervention materials at completion of the 12‐month follow‐up period
Outcomes	Primary outcomes: physical activity, sedentary behaviour Secondary outcomes: anthropometry (height, weight, waist circumference), blood pressure, biomarkers, nutritional intake Other outcome: economic evaluation Relevant proposed outcome measures for SoF table: physical activity duration, sedentary time, BMI
Reason for awaiting classification	Only baseline data and mid‐intervention results published
Stated aim of study	Quote: "the primary aim of the Transform‐Us! study is to determine whether an 18‐month, behavioral and environmental intervention in the school and family settings results in higher levels of physical activity and lower rates of sedentary behavior among 8‐9 year old children compared with usual practice (post‐intervention and 12‐months follow‐up)"
Notes