Impact of nausea/vomiting on EQ-5D-5L utility scores in patients taking iron preparations for heavy menstrual bleeding or anemia

Table 3 b) Generalized Linear Model (GLM)

EQ-5D-5L utility score	Coefficient	SE	z	P > z	95% Confidence Interval
Symptom_nausea/vomiting	-0.165	0.023076	-7.15	0	-0.21022	-0.11977
Symptom_anemia	-0.10595	0.021203	-5	0	-0.1475	-0.06439
Symptom_menstrual pain	-0.10562	0.022635	-4.67	0	-0.14998	-0.06125
Symptom_PMS	-0.07073	0.021922	-3.23	0.001	-0.1137	-0.02777
Primary disease_PMS	-0.06672	0.027276	-2.45	0.014	-0.12018	-0.01326
Constant term	-0.05267	0.018312	-2.88	0.004	-0.08856	-0.01678

When the explanatory variable increases by 1, the EQ-5D-5L utility score can be interpreted as increasing by that coefficient x 100%
For example, if all the other conditions are the same, but the presence or absence of nausea/vomiting is different, it can be interpreted as 16.5% lower for those with nausea/vomiting compared to those without nausea/vomiting
EQ-5D-5L, 5-level EQ-5D version; PMS, premenstrual syndrome; SE, standard error

ISSN: 1472-6874