Table 3
Odds ratio and 95% confidence intervals for elevated (cutoff 1 mg/L) serum CRP concentrations by low or high dietary TAC groups in 443 Japanese women aged 18–22 years
	Category of dietary TAC
	Low (n = 221)	High (n = 222)
FRAP (mmol Fe2+/d)*†	7.41 (0.71-10.60)	16.03 (10.61-37.17)
n (%) with elevated CRP	18 (8.1)	7 (3.2)
Crude model	1 (ref)	0.37 (0.15-0.90)
Multivariate model‡	1 (ref)	0.39 (0.16-0.98)
ORAC (mmol TE/d)*†	12.43 (1.18-16.73)	24.13 (16.78-50.77)
n (%) with elevated CRP	17 (7.7)	8 (3.6)
Crude model	1 (ref)	0.45 (0.19-1.06)
Multivariate model‡	1 (ref)	0.48 (0.20-1.14)
TEAC (mmol TE/d)*†	4.67 (0.44-6.25)	8.83 (6.26-31.75)
n (%) with elevated CRP	19 (8.6)	6 (2.7)
Crude model	1 (ref)	0.30 (0.12-0.75)
Multivariate model‡	1 (ref)	0.32 (0.12-0.82)
TRAP (mmol TE/d)*†	4.34 (0.31-6.66)	10.23 (6.71-52.42)
n (%) with elevated CRP	19 (8.6)	6 (2.7)
Crude model	1 (ref)	0.30 (0.12-0.75)
Multivariate model‡	1 (ref)	0.31 (0.12-0.81)

CRP C-reactive protein, TAC total antioxidant capacity, FRAP ferric reducing ability of plasma, ORAC oxygen radical absorbance capacity, TEAC Trolox equivalent antioxidant capacity, TRAP total radical-trapping antioxidant parameter, TE Trolox equivalent; ref, reference.

* Values are medians (ranges).

† Energy adjustment was performed according to the residual method.

‡ Adjusted for residential region [north (Kanto and Tohoku), central (Tokai and Hokuriku), and south (Kyushu and Chugoku)], size of residential area (city with a population ≥1 million, city with a population <1 million, and town and village), current smoking (yes or no), alcohol drinking (yes or no), dietary supplement use (yes or no), physical activity level (total metabolic equivalents-hours/d, continuous), body mass index (kg/m², continuous), and n-3 polyunsaturated fatty acid intake (g/d, energy-adjusted, continuous).

Kobayashi et al. Nutrition Journal 2012 11:91   doi:10.1186/1475-2891-11-91