Hepatic schistosomiasis, upper gastrointestinal bleeding, and health related quality of life measurements from the Albert Nile Basin

Journal of Patient-Reported Outcomes

Table 4 Summarizes the average marginal effects for EQ-VAS derived disability weights and EQ-5D derived disability weights by different covariates after linear regression and marginal analysis

	Delta-method
	dy/dx	95% Confidence Intervals	p value
Model 1—EQ-VAS derived disability weights
Acute upper gastrointestinal bleeding	0.30	0.23, 0.37	0.001
Praziquantel	0.15	0.07, 0.22	0.001
Age range by decade	0.05	0.02, 0.07	0.001
Body Mass Index ≤ 18.5	0.05	− 0.05, 0.14	0.326
Female gender	0.07	0.00002, 0.13	0.050
Jaundice	− 0.12	− 0.20, − 0.04	0.004
Model 2—EQ-5D derived disability weights
Body mass index ≤ 18.5	0.19	0.05, 0.33	0.009
Acute upper gastrointestinal bleeding	0.10	0.02, 0.18	0.018
Ascites	0.19	0.05, 0.32	0.010
Age range by decade	0.03	0.003, 0.06	0.031
Female gender	0.10	0.03, 0.18	0.006
Praziquantel	0.12	0.04, 0.20	0.003
Farmers	0.07	− 0.005, 0.14	0.069
World Health Organization Anemia grade	− 0.007	− 0.04, 0.03	0.690

Marginal analysis enables examination of the impact of variable x (covariates) on outcome y (disability weights) for representative cases