Table 6.

Univariate and multivariate analysis of factors associated with As daily intake.

Factors	As daily intake (μg)
	Univariate				Multivariate
	β	95% CI		P value	β	95% CI		P value
Amino acids + collagen	Ref				–	–	–	–
Herbal supplements	0.04	− 0.49	0.56	0.89
Vitamins + minerals	− 0.46	− 1.02	0.10	0.11	− 0.55	− 0.79	− 0.31	0.000
Vitamins + minerals + herbs	0.09	− 0.45	0.63	0.75	–	–	–	–
Herbs + vitamins + minerals + fatty acids + enzymes	0.33	− 0.35	1.01	0.34	–	–	–	–
Herbs + probiotics + enzymes + fatty acids	0.75	0.13	1.38	0.018	0.53	0.16	0.89	0.005
Caplet	Ref				–	–	–	–
Powder/liquid	1.69	1.07	2.32	< 0.001	1.65	1.219	2.075	< 0.001
Tablet	0.09	− 0.38	0.57	0.69	–	–	–	–
Soft gel	0.76	0.21	1.31	0.007	0.52	0.18	0.86	0.003
Capsule	0.06	− 0.40	0.51	0.81	–	–	–	–
Australia	Ref				–	–	–	–
USA	0.51	− 0.12	1.14	0.11	–	–	–	–
India	0.46	− 0.25	1.16	0.20	–	–	–	–
EU	0.15	− 0.51	0.82	0.65	–	–	–	–
Canada	0.52	− 0.17	1.22	0.14	–	–	–	–

P values less than 0.05 were considered statistically significant, “–-” not included in the multivariate linear regression model.

β, beta coefficient; CI, confidence interval.