The effect of comorbidity on health-related quality of life for injury patients in the first year following injury: comparison of three comorbidity adjustment approaches

Table 3 Mean observed and predicted comorbid disability weights¹ (pre-existing diseases and injury)

		Predicted
	Observed	Max limit approach	Additive approach	Multiplicative approach
CNLD² and injury	0.23 (0.04)	0.18 (0.02)	0.30 (0.06)	0.28 (0.05)
Heart disease and injury	0.28 (0.26)	0.17 (0.01)	0.26 (0.08)	0.24 (0.07)
Diabetes and injury	0.33 (0.17)	0.18 (0.02)	0.30 (0.01)	0.28 (0.01)
Backache and injury	0.19 (0.19)	0.12 (0.02)	0.14 (0.02)	0.14 (0.02)
Osteoarthritis and injury	0.52 (0.35)	0.39 (0.29)	0.49 (0.34)	0.44 (0.28)
Rheumatoid arthritis and injury	0.25 (0.19)	0.18 (0.04)	0.25 (0.08)	0.23 (0.07)
Other disease and injury	0.30 (0.22)	0.22 (0.13)	0.30 (0.17)	0.28 (0.14)

ISSN: 1478-7954