Higher urine 1-hydroxy pyrene glucuronide (1-OHPG) is associated with tobacco smoke exposure and drinking maté in healthy subjects from Rio Grande do Sul, Brazil

Table 2 Multivariate associations¹ between characteristics and urine 1-hydroxypyrene glucuronide (1-OHPG) concentration in the healthy subjects from Rio Grande de Sul

Characteristic	Estimate [2]	95% Confidence interval	P-value [3]
Intercept	-0.74	-1.56, 0.079	0.076
Male	-0.048	-0.31, 0.22	0.72
Urban residence	0.028	-0.28, 0.33	0.86
Ever drink cachaHa	0.20	-0.13, 0.54	0.23
Age quartile 1	Reference
Age quartile 2	0.097	-0.23, 0.42	0.56
Age quartile 3	0.40	0.082, 0.72	0.014
Age quartile 4	0.17	-0.17, 0.50	0.33
Smoke Exposure⁴	0.98	0.045, 1.52	0.0004
Maté	0.53	0.16, 0.90	0.0053
Interaction (Smoke * Maté)	-0.51	-1.05, 0.10	0.11
Prepare barbeque weekly	0.21	-0.20, 0.62	0.32
Interaction (Smoke * BBQ)	-0.48	-1.026, 0.015	0.057

[1] All estimates come from a single multivariate linear regression model. The total model r² was 0.21
[2] The model was fit using log₁₀ transformed urine 1-OHPG concentrations.
[3] All P-values come from F-tests.
[4] Subjects reporting current smoking or a cotinine value greater then 1 were considered smoke exposed.

ISSN: 1471-2407