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Table 3 Primary and secondary outcomes in children, parents and dogs

From: Children, parents, and pets exercising together (CPET) randomised controlled trial: study rationale, design, and methods

  Outcomes
Children Primary outcome • 10 week change (baseline-1 week post-intervention) in objectively measured total volume of physical activity with the Actigraph accelerometer (The Actigraph, Florida) using the accelerometry count per minute [40]; over 7 days in the children.
Children Secondary outcomes • Changes in objectively measured light intensity physical activity and MVPA (using the validated accelerometry cut-points of Puyau et al.; [41]);
  • Changes in objectively measured sedentary behaviour (using the validated Actigraph accelerometry cut-point of Puyau et al. [41]);
  • Changes in the patterning of sedentary behaviour (length of sedentary bouts, frequency of breaks in sedentary time; 7 day Actigraph accelerometer with the pragmatic cut-off, not yet validated and calibrated, of 150 counts per minute to define sitting time; 34);
  • Changes in body composition (fat mass index and lean mass index) based DXA using a Lunar Prodigy whole-body scanner (GE Medical Systems, Madison, WI) in conjunction with enCORE software version 13;
  • Changes in body weight and in BMI Z scores expressed relative to UK 1990 reference data; Changes in whole body and lumbar spine bone mineral content (DXA);
  • Changes in Child Health Related Quality of Life, as reported separately by both the children and by their parents, using the PedsQL which is practical, valid, and sensitive to change resulting from lifestyle interventions [37, 42].
Parents Secondary outcomes • Changes in objectively measured physical activity (7 day Actigraph accelerometry) for total volume of physical activity, as well as light intensity physical activity and MVPA;
  • Changes in sedentary behaviour (total time and patterning of sitting time using the pragmatic cut-off of 100 Actigraph counts per minute to define sitting behaviour; 34);
  • Changes in parent body weight.
Dog Secondary outcomes • Changes in body condition score [43];
• Changes in total volume of physical activity (Actigraph accelerometry; 39), in part as a process evaluation measure.