Table 4.

Association between quartiles of total, subclasses and individual phenolic acid intake and advanced prostate cancer.

	Phenolic Acid Quartiles, OR (95% CI) a
	Q1	Q2	Q3	Q4
Total phenolic acids	Ref.	0.75 (0.16–3.55)	0.68 (0.14–3.21)	0.34 (0.05–2.22)
Subclasses
Hydroxybenzoic acids	Ref.	0.52 (0.09–2.97)	0.43 (0.50–0.09)	0.85 (0.86–0.20)
Hydroxycinammic acid	Ref.	0.44 (0.10–1.86)	0.25 (0.05–1.32)	0.10 (0.01–1.10)
Hydroxyphenilacetic acid	Ref.	0.45 (0.04–5.18)	3.40 (0.67–17.22)	0.71 (0.09–5.66)
Individual phenolic acids
Caffeic acid	Ref.	0.62 (0.14–2.74)	0.31 (0.07–1.33)	0.01 (0.00–1.00)
Cinnamic acid	Ref.	0.18 (0.02–1.61)	0.57 (0.13–2.53)	0.46 (0.10–2.15)
Vanillic acid	Ref.	1.58 (0.35–7.11)	0.69 (0.14–3.43)	0.13 (0.01–1.55)
Ferulic acid	Ref.	1.51 (0.32–1.10)	1.66 (0.97–2.83)	1.66 (0.97–2.83)

OR, odds ratio; CI, confidence interval; Ref, Reference; ^a ORs were adjusted for energy intake (kcal/day, continuous).