Table 7.

Overview of potential case-mix adjusters and whether or not adjustment is indicated

	Communi-cation	Access	Continuity	Comprehen-siveness	Self-reported health	Enable-ment
Age	Yes	Yes	Yes	Yes	Yes	Yes
Sex	No fixed effect	No fixed effect	Yes	No fixed effect	Yes	Yes
Education	No; slope effect important	Yes	Yes	Yes	Yes	Yes
Household income	Yes	Yes	No fixed effect	Yes	Yes	Yes
Ethnicity	No; slope effect important	Yes	Yes	Yes	Yes	Yes
Place of living	No; slope effect important	No; slope effect important	Yes	Yes	Yes	Yes
Self-rated health	Yes	Yes	No; slope effect important	Yes	-	Yes
Longstan-ding disease	Yes	No fixed effect	Yes	Yes	Yes	No fixed effect