Table 4. Distribution, mean, SD, median, IQR of severity of vomiting in hemodialysis patients according to gender, age, educational level, residential area, job, and disease duration .

Characteristics	n	Severity of vomiting								Mean	SD	Median	IQR	r	P
		No Nausea		Mild		Moderate		Severe
		No.	%	No.	%	No.	%	No.	%
Gender														-	0.102
Female	26	21	80.8	3	11.5	2	7.7	-	-	1.27	0.60	1.00	0.00
Male	34	32	94.1	2	5.9	0	0.0	-	-	1.06	0.24	1.00	0.00
Age (y)														0.007	0.956
<50	15	14	93.3	1	6.7	-	-	-	-	1.07	0.26	1.00	0.00
50-59	14	11	78.6	1	7.1	2	14.3	-	-	1.36	0.74	1.00	0.25
60-69	12	11	91.7	1	8.3	-	-	-	-	1.08	0.29	1.00	0.00
≥70	19	17	89.5	2	10.5	-	-	-	-	1.11	0.31	1.00	0.00
Educational level														0.139	0.290
Illiterate	9	9	100	-	-	-	-	-	-	0.00	0.00	0.00	0.00
Primary	22	19	86.4	3	13.6	-	-	-	-	1.14	0.35	1.00	0.00
Intermediate	11	11	100	-	-	-	-	-	-	0.00	0.00	0.00	0.00
Secondary	12	8	66.7	2	16.7	2	16.7	-	-	1.50	0.80	1.00	1.00
Diploma+	6	6	100	-	-	-	-	-	-	0.00	0.00	0.00	0.00
Residential area														-	0.659
City	55	48	87.3	5	9.1	2	3.6	-	-	1.16	0.46	1.00	0.00
Rural	5	5	100	-	-	-	-	-	-	0.00	0.00	0.00	0.00
Job														-	0.441
Housekeeper	22	18	81.8	2	9.1	2	9.1	-	-	1.27	0.63	1.00	0.00
Retired	23	21	91.3	2	8.7	-	-	-	-	1.09	0.29	1.00	0.00
Others	15	14	93.3	1	6.7	-	-	-	-	1.07	0.26	1.00	0.00
Disease duration (mon)														0.023	0.860
≤12	11	10	90.9	1	9.1	-	-	-	-	1.09	0.30	1.00	0.00
13-24	16	13	81.3	2	12.5	1	6.3	-	-	1.25	0.58	1.00	0.00
25-36	7	7	100	-	-	-	-	-	-	0.00	0.00	0.00	0.00
37-60	9	9	100	-	-	-	-	-	-	0.00	0.00	0.00	0.00
>60	17	14	82.4	2	11.8	1	5.9	-	-	1.24	0.56	1.00	0.00

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