Table 4.

Parameter estimates of independent variables in stepwise generalised linear regression model of annual patient co-payment^1,2

Variable	Model 1: Sex, age and Indigenous identification only			Model 2: Sex, age, Indigenous identification + Rurality			Model 3: Sex, age, Indigenous identification + Rurality + Disadvantage
	Co-efficient	SE	p-value	Co-efficient	SE	p-value	Co-efficient	SE	p-value
Intercept	3.98	0.05	<.0001	4.05	0.05	<.0001	3.81	0.06	<.0001
Female	−0.03	0.02	0.18	−0.03	0.02	0.13	−0.04	0.02	0.52
Age at diagnosis	0.007	0.001	<.0001	0.007	0.001	<.0001	0.01	0.001	<.0001
Indigenous identification	−1.03	0.07	<.0001	−1.01	0.07	<.0001	−0.98	0.07	<.0001
Regional Area				−0.15	0.02	<.0001	−0.04	0.02	0.11
Remote Area				−0.16	0.03	<.0001	−0.01	0.04	0.83
Area-based deprivation Quintile 2							−0.04	0.05	0.39
Area-based deprivation Quintile 3							0.01	0.04	0.71
Area-based deprivation Quintile 4							0.19	0.04	<.0001
Area-based deprivation Quintile 5							0.30	0.05	<.0001

¹MBS and PBS patient co-payments combined

²Abbreviated output, all models adjusted for cancer type