Table 2.

Odds ratios (95% confidence intervals) of anemia across quartiles of dietary magnesium intake stratify by gender, NHANES 2011–2016.

Magnesium intake (mg/d)	N Event%	Crude model		Model 1		Model 2
		OR (95%CI)	P value	OR (95% CI)	P value	OR (95%CI)	P value
Female
Log2 Mg	932 (13.8)	0.73 (0.67 ~ 0.81)	<0.001	0.79 (0.71 ~ 0.87)	<0.001	0.71 (0.58 ~ 0.86)	0.001
Q1 (<179)	307 (18)	1(Ref)	<0.002	1(Ref)		1(Ref)
Q2 (179–239)	194 (12.6)	0.66 (0.54 ~ 0.8)	<0.003	0.71 (0.58 ~ 0.87)	0.001	0.73 (0.58 ~ 0.92)	0.007
Q3 (239–304)	191 (13.1)	0.69 (0.56 ~ 0.83)	<0.004	0.76 (0.62 ~ 0.93)	0.008	0.78 (0.6 ~ 1.01)	0.058
Q4 (304–395)	158 (13)	0.68 (0.55 ~ 0.84)	<0.005	0.78 (0.63 ~ 0.97)	0.026	0.76 (0.55 ~ 1.05)	0.096
Q5 (>395)	82 (9.8)	0.5 (0.38 ~ 0.64)	<0.006	0.57 (0.44 ~ 0.74)	<0.001	0.56 (0.36 ~ 0.87)	0.01
P for trend			<0.007		<0.001		0.046
Male
Log2 Mg	544 (8.1)	0.65 (0.58 ~ 0.72)	<0.001	0.82 (0.72 ~ 0.93)	0.002	0.9 (0.7 ~ 1.15)	0.401
Q1 (<179)	127 (12.9)	1(Ref)		1(Ref)		1(Ref)
Q2 (179–239)	107 (9.7)	0.72 (0.55 ~ 0.95)	0.019	0.85 (0.63 ~ 1.14)	0.266	0.89 (0.64 ~ 1.24)	0.479
Q3 (239–304)	106 (8.5)	0.62 (0.47 ~ 0.82)	0.001	0.82 (0.61 ~ 1.09)	0.174	0.89 (0.62 ~ 1.27)	0.509
Q4 (304–395)	100 (6.8)	0.49 (0.37 ~ 0.65)	<0.001	0.7 (0.52 ~ 0.94)	0.019	0.84 (0.56 ~ 1.25)	0.385
Q5 (>395)	104 (5.6)	0.4 (0.3 ~ 0.52)	<0.001	0.67 (0.5 ~ 0.89)	0.007	0.78 (0.46 ~ 1.32)	0.354
P for trend			<0.001		0.003		0.376

Crude model adjusted for none. Model 1 adjusted for age and race. Model 2 adjusted for all covariates listed in Table 1.