Table 3.

Odds ratios (with 95% confidence intervals in parentheses) for melanoma by quintile of dietary intake of vitamin D, Emilia Romagna region, Italy

	Quintile of vitamin D dietary intake (μg/day)a
	Case-control matched sets	I (<1.62)b	II (1.62 – 2.13)	III (2.13–2.72)	IV (2.72–3.67)	V (≥3.67)	PC
All subjects	380	1.00	0.96 (0.63 – 1.45)	0.82 (0.54 – 1.26)	0.62 (0.39 – 0.98)	0.53 (0.31 – 0.88)	0.005
Men	175	1.00	0.80 (0.41 – 1.56)	0.84 (0.45 – 1.58)	0.72 (0.36 – 1.45)	0.38 (0.17 – 0.87)	0.044
Women	205	1.00	1.12 (0.64 – 1.94)	0.80 (0.44 – 1.44)	0.56 (0.30 – 1.04)	0.69 (0.34 – 1.39)	0.057
All subjects < 60 years	218	1.00	0.97 (0.54 – 1.74)	0.88 (0.48 – 1.61)	0.57 (0.29 – 1.13)	0.63 (0.32 – 1.27)	0.078
All subjects ≥ 60 years	162	1.00	0.91 (0.49 – 1.69)	0.70 (0.37 – 1.32)	0.71 (0.36 – 1.37)	0.37 (0.13 – 0.87)	0.032
Men < 60 years	86	1.00	0.83 (0.26 – 2.63)	0.96 (0.35 – 2.63)	0.92 (0.29 – 2.84)	0.76 (0.14 – 1.50)	0.216
Men ≥ 60 years	89	1.00	0.87 (0.37 – 2.05)	0.76 (0.31 – 1.85)	0.75 (0.30 – 1.93)	0.33 (0.09 – 1.16)	0.148
Women < 60 years	132	1.00	1.03 (0.50 – 2.13)	0.84 (0.38 – 1.84)	0.46 (0.19 – 1.09)	0.76 (0.30 – 1.88)	0.169
Women ≥ 60 years	73	1.00	1.09 (0.41 – 2.93)	0.53 (0.20 – 1.43)	0.69 (0.25 – 1.85)	0.33 (0.08 – 1.40)	0.110

^aBased on dietary vitamin D intake distribution in controls

^bReferent category

^cP for trend using quintiles of vitamin D intake in a conditional logistic regression model adjusting for energy and calcium intake, phototype, history of sunburns, skin sun reaction and education