Table 1. Demographic characteristics of the studied population .

Variables	Mean	Standard Deviation
Monthly household expenditure (Exchange rate: 36 000 Iranian Rial to US$ 1.00)	367.12 US$	132.70 US$
Monthly Out-of-pocket health expenditure	38.50 US$	27.15 US$
Number of times household used inpatient services during the last year	1.3	0.64
Number of times household used outpatient services during the last month	1.6	0.72
Patient's age	50.2 years	10.12
Family size	4.1 members	1.15