Table 3.

Mixed model of the ratio between workday (WD) and day off (DO) GM RHI and GM BPA among 57 metal smelter furnace workers, adjusted for S-caffeine and time since last meal

	N	BPA						RHI
		GMWD	GMDO	Ratio	95% CI		p	GMDO	GMWD	Ratio	95% CI		p
All	57	772	535	1.44	1.17	1.78	0.001	1.84	1.70	1.08	1.00	1.17	0.05
Plant A	36	820	637	1.29	0.98	1.68	0.07	1.83	1.64	1.12	1.02	1.23	0.02
Plant B	21	685	418	1.64	1.13	2.39	0.01	1.85	1.83	1.01	0.86	1.18	0.91
Age < 34	27	592	577	1.03	0.80	1.32	0.85	1.76	1.80	0.98	0.88	1.09	0.72
Age ≥ 34	30	993	499	1.99	1.47	2.69	0.000	1.94	1.61	1.21	1.09	1.34	0.001
Males	52	841	582	1.45	1.17	1.78	0.001	1.84	1.69	1.09	1.00	1.18	0.05

Due to missing covariate data at both study points, two subjects were excluded from the analyses

RHI reactive hyperemia index, BPA baseline pulse amplitude, GM geometric mean, CI confidence interval