Table 3. Distribution, mean, SD, median, IQR of severity of nausea in hemodialysis patients according to gender, age, educational level, residential area, job, and disease duration .

Characteristics	n	Severity of nausea								Mean	SD	Median	IQR	r	P
		No Nausea		Mild		Moderate		Severe
		No.	%	No.	%	No.	%	No.	%
Gender														-	0.034
Female	26	15	57.7	4	15.4	6	23.1	1	3.8	1.77	2.45	0.00	4.25
Male	34	28	82.4	3	8.8	2	5.9	1	2.9	0.68	1.63	0.00	0.00
Age (y)														-0.220	0.091
<50	15	11	73.3	2	13.3	2	13.3	-	-	0.93	1.71	0.00	2.00
50-59	14	7	50.0	3	21.4	3	21.4	1	7.1	2.21	2.75	1.00	5.00
60-69	12	8	66.7	1	8.3	3	25.0	-	-	1.25	1.96	0.00	3.50
≥70	19	17	89.5	1	5.3	-	-	1	5.3	0.47	1.64	0.00	0.00
Educational level														0.055	0.677
Illiterate	9	7	77.8	2	22.2	-	-	-	-	0.56	1.13	0.00	1.00
Primary	22	15	68.2	3	13.6	3	13.6	1	4.5	1.27	2.19	0.00	2.00
Intermediate	11	10	90.9	1	9.1	-	-	-	-	0.27	0.90	0.00	0.00
Secondary	12	5	41.7	1	8.3	5	41.7	1	8.3	2.75	2.80	3.00	4.75
Diploma+	6	6	100	-	-	-	-	-	-	0.00	0.00	0.00	0.00
Residential area														-	0.756
City	55	39	70.9	7	12.7	7	12.7	2	3.6	1.18	2.12	0.00	2.00
Rural	5	4	80.0	-	-	1	20.0	-	-	0.80	1.79	0.00	2.00
Job														-	0.257
Housekeeper	22	13	59.1	4	18.2	4	18.2	1	4.5	1.68	2.48	0.00	2.75
Retired	23	19	82.6	-	-	3	13.0	1	4.3	0.87	2.01	0.00	0.00
Others	15	11	73.3	3	20.0	1	6.7	-	-	0.80	1.42	0.00	2.00
Disease duration (mon)														-0.095	0.469
≤12	11	6	54.5	3	27.3	2	18.2	-	-	1.36	1.69	0.00	3.00
13-24	16	11	68.8	2	12.5	2	12.5	1	6.3	1.38	2.42	0.00	2.75
25-36	7	6	85.7	-	-	1	14.3	-	-	0.71	1.89	0.00	0.00
37-60	9	7	77.8	1	11.1	1	11.1	-	-	0.78	1.72	0.00	1.00
>60	17	13	76.5	1	5.9	2	11.8	1	5.9	1.18	2.38	0.00	1.00

Abbreviations: IQR, interquartile range; SD, standard deviation.