. Author manuscript; available in PMC: 2019 Jan 1.

Published in final edited form as: Br J Nutr. 2018 Apr 20;120(1):81–89. doi: 10.1017/S0007114518000818

Table 4.

Dietary mineral intake by recommended dietary allowance (RDA) and risk of sporadic anovulation.

	<RDA

Dietary minerals (/day)	RR	95% CI
Calcium, Ca (<1,000 mg)	1.82	0.62	5.34
Phosphorus, P (<700 mg)	1.99	0.72	4.96
Magnesium, Mg (<310 mg)	1.58	0.46	5.39
Iron, Fe (<18 mg)	1.39	0.58	3.37
Zinc, Zn (< 8mg)	0.94	0.48	1.85
Copper, Cu (<0.9 mg)	1.12	0.58	2.17
Manganese, Mn (<1.8 mg)	2.00	1.02	3.94
Selenium, Se (<55 Mg)	2.66	0.96	7.36
Sodium, Na (<1,500 mg)	2.70	1.00	7.31
Potassium, K (<2,227 mg)	1.13	0.48	2.64

Note: All models were adjusted for age, body mass index, race, physical activity, Mediterranean diet score, and intakes of energy, fiber, and protein. Intakes of dietary potassium were categorized by the US average intakes (e.g., 2,227 mg/day). Statistically significant estimates and intervals are in bold.

CI, confidence interval; RR, risk ratio.