Table 6a. Marginal effects of income.

Base: Income quintile 1 (lowest)		Mobility	Self-care	Usual Activities	Pain/ Discomfort	Anxiety/ Depression
Income 2	No problems	0.0747 ***	0.0132	0.0601 **	0.0307	0.0541 *
	Slight problems	-0.0459 ***	-0.0103	-0.0352 **	-0.0145	-0.0325
	Moderate problems	-0.0222 ***	-0.0021	-0.0174 **	-0.0129	-0.0183 *
	Severe problems	-0.0053 **	-0.0007	-0.0057 **	-0.0028	-0.0028
	Extreme/Unable	-0.0013 *	-0.0002	-0.0019 *	-0.0005	-0.0005
Income 3	No problems	0.0579 **	0.0061	0.0806 ***	-0.0059	0.0069
	Slight problems	-0.0354 **	-0.0048	-0.0473 ***	0.0027	-0.0041
	Moderate problems	-0.0174 **	-0.0009	-0.0232 ***	0.0026	-0.0024
	Severe problems	-0.0041 **	-0.0003	-0.0076 ***	0.0006	-0.0003
	Extreme/Unable	-0.001	-0.0001	-0.0025 **	0.0001	-0.0001
Income 4	No problems	0.0712 **	0.0204 *	0.0926 ***	0.0494	0.0626 *
	Slight problems	-0.0437 **	-0.0159 *	-0.0544 ***	-0.0235	-0.0376 *
	Moderate problems	-0.0213 **	-0.0032 *	-0.0266 ***	-0.0207	-0.0212 *
	Severe problems	-0.0051 **	-0.001	-0.0087 ***	-0.0045	-0.0033 *
	Extreme/Unable	-0.0012 *	-0.0003	-0.0028 **	-0.0007	-0.0005
Income 5	No problems	0.0789 **	0.0376 ***	0.1007 ***	0.1177 **	0.1203 ***
	Slight problems	-0.0485 **	-0.0294 ***	-0.0594 ***	-0.0584 **	-0.0733 ***
	Moderate problems	-0.0235 **	-0.0058 **	-0.0289 ***	-0.0477 **	-0.0399 ***
	Severe problems	-0.0056 **	-0.0019 *	-0.0094 ***	-0.01 **	-0.0061 ***
	Extreme/Unable	-0.0014 *	-0.0005	-0.0031 **	-0.0016 *	-0.001

Marginal effects are presented for just income though regressions are also controlled for urban/rural status, age group (18–35, 34–45, 44–60, 61+), sex, secondary education (Y/N), third level education (Y/N) and private insurance (or in the last 3 years: Y/N)

*** significant at 0.01, ** significant at 0.05, * significant at 0.1