Table 4.

Odds ratios and 95% CIs of different metabolic obesity phenotypes by four iron groups in CHNS 2009.

	MUNW	MHO	MUO
	OR (95% CI)
Overall
Low ferritin and low transferrin	Reference	Reference	Reference
Low ferritin and high transferrin	1.71 (1.25 to 2.35)	1.42 (1.19 to 1.69)	1.83 (1.47 to 2.28)
High ferritin and low transferrin	1.80 (1.32 to 2.46)	1.20 (0.99 to 1.44)	2.06 (1.65 to 2.56)
High ferritin and high transferrin	4.26 (3.08 to 5.89)	2.09 (1.71 to 2.56)	5.95 (4.73 to 7.48)
P for interaction	0.759	0.953	0.015
Females
Low ferritin and low transferrin	Reference	Reference	Reference
Low ferritin and high transferrin	1.77 (1.23 to 2.53)	1.47 (1.19 to 1.81)	1.89 (1.46 to 2.45)
High ferritin and low transferrin	1.22 (0.82 to 1.82)	1.06 (0.80 to 1.39)	1.51 (1.12 to 2.04)
High ferritin and high transferrin	3.12 (2.06 to 4.73)	1.51 (1.09 to 2.09)	3.85 (2.79 to 5.31)
P for interaction	0.550	0.200	0.576
Males
Low ferritin and low transferrin	Reference	Reference	Reference
Low ferritin and high transferrin	1.91 (0.94 to 3.90)	1.41 (1.01 to 1.96)	2.13 (1.34 to 3.38)
High ferritin and low transferrin	2.69 (1.51 to 4.82)	1.18 (0.89 to 1.55)	2.73 (1.85 to 4.01)
High ferritin and high transferrin	5.11 (2.78 to 9.41)	2.14 (1.60 to 2.86)	7.90 (5.32 to 11.73)
P for interaction	0.282	0.568	0.136

CI, confidence interval; MHNW, metabolically healthy with normal weight; MUNW, metabolically unhealthy with normal weight; MHO, metabolically healthy with overweight/obesity; MUO, metabolically unhealthy with overweight/obesity.

The reference of multinomial logistic models was MHNW. Odds ratios were adjusted for age, sex, smoking history, drinking history, education, residence, marital status, high-sensitivity C-reactive protein, and disease counts (sex was not included in sex stratified analysis).

The bold values indicate the statistically significant.