We did not observe a clear trend relative to time since last welding-fume exposure (OR3: 1.00, CI: 0.86–1.18), ranging from an OR3 for current welding of 1.22 (CI: 0.71–2.09) to a relative risk after ≥17 years of welding of 1.08 (CI: 0.52–2.21).
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