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Table 1 Demography of children with four definitions of GJH for test rounds 2012 and 2013

From: The extent and risk of knee injuries in children aged 9–14 with Generalised Joint Hypermobility and knee joint hypermobility - the CHAMPS-study Denmark

  Children with GJH on both test rounds (group 1a, n = 36) Children with GJH and knee hypermobility on both test rounds (group 1b, n = 26) Children with GJH in both test rounds with a fluctuation of 1 point in BT score (group 2a, n = 119) Children with GJH on both test rounds with a fluctuation of 1 point in BT score and knee hypermobility (group 2b, n = 56)
Participants (no. boys/girls) 7/29 6/20 40/67 17/31
Age (yrs)     
Test round 1 10.7 ± 1.3 10.7 ± 1.3 10.9 ± 1.4 11.13 ± 1.4
Height (cm)     
Test round 1 148.7 ± 10.6 148.7 ± 11.7 149.9 ± 10.1 150.9 ± 11.5
Test round 2 154.5 ± 10.2 154.3 ± 11.3 155.5 ± 9.7 156.5 ± 10.6
Growth     
Test round 2 - Test round 1 5.8 ± 1.8 5.5 ± 1.7 5.6 ± 1.8 5.5 ± 1.8
Body mass (kg)     
Test round 1 38.5 ± 8.9 38.7 ± 9.7 40.8 ± 10.3 42.2 ± 12.2
Test round 2 42.8 ± 10.3 42.7 ± 11.2 43.8 ± 10.1 44.7 ± 10.5
BMI (kg/m 2 )     
Test round 1 17.2 ± 2.2 17.2 ± 2.3 17.9 ± 2.7 17.2 ± 2.3
Test round 2 17.6 ± 2.7 17.7 ± 2.9 17.8 ± 2.5 18.1 ± 2.6
School type     
(no. control/intervention) 9/27 6/20 46/73 21/35
Sports participation units (times/week) 1.6 ± 1.2 1.6 ± 1.2 1.4 ± 1.1 1.6 ± 1.2
  1. GJH = Generalised Joint Hypermobility, Growth delta value of height between test rounds 2012 and 2013, BMI = Body Mass Index. Values are the mean ± SD unless otherwise indicated