Table 6.

The relationship between EDSS score and various costs imposed on pwms

Cost type	IRRa		USDb		EUROc		βe	P-value
	Bd	Std. Error	Bd	Std. Error	Bd	Std. Error
Direct medical costs	7,462,080	27,233,210	177.66	648.40	151.42	552.62	0.157	0.007
Direct non-medical cost	1,426,870	1,662,640	33.97	39.58	28.95	33.73	0.050	0.391
Indirect cost	− 749,700	427,760	−17.85	10.18	−15.21	8.68	−0.101	0.081
Total cost	8,139,260	3,265,050	193.79	77.73	165.16	66.25	0.143	0.013

^aThe Iranian Rial

^bUnited States Dollar

^cThe EUROope Currency

^dB or unstandardized beta: it refers to the slope of the line between the predictor variable (EDSS score) and the dependent variable (costs of illness)

^eβ or standardized beta: it refers to the percentage change in dependent variable (costs of illness) due to a unit change in predictor variable (EDSS score)