Table 5.

Linear regression analysis between cobalt skin exposure, cobalt in inhalable air, and uptake expressed as cobalt in blood

	Uptake	Exposure	r 2	B	95%CI B	p‐Value
Simple linear regression	Blood cobalt	Skin cobalt (µg/cm2/h)	0.073	0.009	0.001–0.016	<0.05
	Blood cobalt	Inhalable air cobalt (mg/m3)	0.174	53.0	24.5–81.6	<0.001
Multiple linear regression	Blood cobalt	Skin cobalt (µg/cm2/h)	0.317	0.010	0.003–0.016	<0.01
		Inhalable air cobalt (mg/m3)	—	49.1	26.8–71.4	<0.0001

95%CI (B), 95% confidence interval for B; B, regression coefficient; r ², explained variance.