Table 4.

Serum chromium levels and the occurrence of stages III–IV of lung cancer

Quartile	Cr level (μg/L)	Cases	Controls	OR (95% CI)	p- value
I	0.03–0.06	11	24	1.00 (−)	–
II	0.07–0.09	24	32	1.61 (0.67–3.86)	0.29
III	0.10–0.13	31	25	3.05 (1.22–7.63)	0.02
IV	0.14–1.63	34	19	4.68 (1.73–12.68)	< 0.01

Italics - Results with statistical significance