Table 4.

General linear model for repeated measures examining Health-related quality of life experiences of patients who presented at a neck and back outpatient clinic and completed a questionnaire for the initial assessment (Time 1) and six months later (Time 2) (N = 4432). Higher scores indicate greater perceived quality of life

Time 1			Time 2
Model	M	SD	M	SD	M diff	SE diff	p diff	F	df	df(error)	p
Mean values of the Western preference pattern
No sickness absence	0.79	0.13	0.81	0.14	0.02	0.00	< 0.001
Graded sickness absence	0.75	0.14	0.79	0.15	0.04	0.01	< 0.001
Full sickness absence	0.68	0.20	0.73	0.20	0.05	0.00	< 0.001
Between subjects
Intercept								119434.44	1	4429	< 0.001
Sickness absence								175.75	2	4429	< 0.001
Within subjects
Time								186.31	1	4429	< 0.001
Time * sickness absence								17.84	2	4429	< 0.001