Nutrition Journal

Table 4 Spearman correlation coefficients (ρ) between fish/fish products and fatty fish and biomarker, n = 49

From: Validation of repeated self-reported n-3 PUFA intake using serum phospholipid fatty acids as a biomarker in breast cancer patients during treatment

Biomarker		PFD				FFQ
		Fish and fish products		Fatty fish		Fish and fish products		Fatty fish
	Time‡	ρ	95% CI	ρ	95% CI	ρ	95% CI	ρ	95% CI
Sum n-3†	0	0.19	−0.10, 0.45	0.21	−0.07, 0.47	0.03	− 0.25, 0.31	0.16	− 0.13, 0.42
	6	0.32*	0.04, 0.55	0.27	−0.01, 0.52
	12	0.24	−0.04, 0.49	0.40*	0.14, 0.61	0.20	−0.09, 0.46	0.43*	0.17, 0.64
EPA	0	0.14	−0.15, 0.40	0.18	−0.11, 0.44	0.05	−0.23, 0.33	0.20	−0.09, 0.45
	6	0.24	−0.04, 0.49	0.15	−0.14, 0.41
	12	0.16	−0.13, 0.42	0.39*	0.12, 0.60	0.13	−0.16, 0.39	0.31*	0.03, 0.54
DHA	0	0.25	−0.03, 0.50	0.23	−0.05, 0.48	0.04	−0.25, 0.32	0.22	−0.07, 0.47
	6	0.33*	0.05, 0.56	0.26	−0.03, 0.50
	12	0.27	−0.02, 0.51	0.30*	0.02, 0.54	0.23	−0.06, 0.48	0.44*	0.19, 0.65

CI Confidence interval, PFD pre-coded food diary, FFQ food frequency questionnaire
†Sum n-3: ALA (18:3n-3), EPA (20:5n-3), DPA (22:5n-3), DHA (22:6n-3)
‡time 0: around surgery (FFQ: presurgery, PFD: postsurgery, biomarker: presurgery), time 6: 6 months postsurgery, time 12: 12 months postsurgery
* p<0.05

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ISSN: 1475-2891

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