Table 1.

Distribution of absolute and relative abundance of the research units based on the personal characteristics

Demographic characteristics	Groups	Frequency	Percentage
Age	Under 30	6	5.5
	30–39	11	10.0
	40–49	16	14.5
	50–59	33	30.0
	Above 59	44	40.0
Gender	Male	53	48.2
	Female	57	51.8
Marital status	Single	17	15.5
	Married	93	84.5
Education level	Illiterate and elementary	55	50.0
	Middle school and high school	30	27.3
	Diploma	19	17.3
	Above diploma	6	5.5
Income level	5,000 Thousand Rials	58	52.7
	10 Million – 5,000 Thousand Rials	24	21.8
	Above 1 Million Rials	28	25.5
Job	Unemployed	65	59.1
	Worker	18	16.4
	Employee	13	11.8
	Self‐employment	14	12.7
History of haemodialysis	1 year	36	32.7
	1–5 years	53	48.2
	Above 5 years	21	19.1
Underlying disease	High blood pressure	56	50.9
	Diabetes	20	18.2
	Diabetes and blood pressure	34	30.9