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Table 5 The effect of time on rates of change in physical and psychosocial scores (level-1 model)

From: Health-related quality of life of children with physical disabilities: a longitudinal study

Parameter Physical Psychosocial
Average scores at Time 1 38.3 44.2
95% CI [36.8, 39.8] [43.2, 45.3]
SD of between-child differences 13.8 9.4
50% range of differences 29.0, 47.6 37.9, 50.6
Average change per time 0.3 0.6
95% CI [–0.3, 0.9] [0.2., 1.0]
SD of between-child differences 5.0 1.9
50% range of differences -1.2, 1.8 -0.7, 1.9
Within-child residual SD 8.4 5.7