Table 1. Absolute and relative frequency of subjects in terms of incidence and severity of nausea during hemodialysis .

Severity of nausea	Number	Percent
Lack of nausea	43	71.7
Mild	7	11.7
Moderate	8	13.3
Severe	2	3.3
Very severe	0	0
Mean severity of nausea	1.15 ± 2.08