Age 2 – 18 years (mean 11 years)
Year 2009 – ongoing
Wave Survey 1
(completed 1 week before Clinic Visit 1)
Clinic Visit 1/Survey 2 Clinic Visit 2
(1 week after Clinic Visit 1)
Use of time S:MARCA
Screen time P:SDV *
Sports ability
Exercise behaviour P:IPAQ
Physical activity and sedentary behaviour P:SDV *
O:AM (fitted)
O:AM (removed)

Featured measurements

AM: Activity Monitor (GENEActiv accelerometer)
HopSCOTCH: Shared Care Obesity Trial in Children derived
IPAQ: International Physical Activity Questionnaire
LEAP: Live, Eat and Play Study derived
LSAC: Longitudinal Study of Australian Children derived
MARCA: Multimedia Activity Recall in Children and Adults
SDV: Study Devised Variable


* Media use and physical activity questions in COBRA are shared between COBRA, HopSCOTCH, LSAC and LEAP


A = Administration report abstraction
C = Index child report (reporting on others)
L = Linkage (to other databases)
M = Medical records data abstraction
O = Observation/direct assessment
N = Nurse report
P = Parent/primary caregiver report
Pe = Peer report
S = Self report
T = Teacher report
X = Undefined
XBF = Pertaining to biological father
XBM = Pertaining to biological mother
XC = Pertaining to index child
XF = Pertaining to father
XFam = Pertaining to family
XG = Pertaining to grandparent(s)
XM = Pertaining to mother
XP = Pertaining to parent(s)
XPa = Pertaining to partner
XPe = Pertaining to peers
XPr = Pertaining to primary caregiver
XSi = Pertaining to sibling(s)