Table 2.

Spearman rank correlation coefficients and 95% confidence intervals of energy-adjusted HAA intake and PhIP level per melanin content in hair^a

	All subjects		Subjects with over LOD values		Subjects with over LOQ values
	CC	95% CI	CC	95% CI	CC	95% CI
PhIP intake	0.35	(0.11, 0.54)	0.21	(−0.05, 0.45)	0.34	(−0.07, 0.66)
MeIQ intake	0.36	(0.13, 0.56)	0.24	(−0.02, 0.47)	0.20	(−0.22, 0.56)
MeIQx intake	0.32	(0.08, 0.52)	0.24	(−0.02, 0.47)	0.17	(−0.25, 0.53)
Total HAA intake	0.34	(0.11, 0.54)	0.22	(−0.05, 0.45)	0.23	(−0.19, 0.58)

CC correlation coefficient, CI confidence interval, HAA heterocyclic aromatic amine, LOD limit of detection, LOQ limit of quantification, MeIQ 2-amino-3,4-dimethylimidazo [4,5-f]quinoline, MeIQx 2-amino-3,8-dimethylimidazo [4,5-f]quinoxaline, PhIP 2-amino-1-methyl-6-phenylimidazo [4,5-b]pyridine

^aData are from Iwasaki et al. [20]