Serum iron levels and the risk of Parkinson disease: a Mendelian randomization study.

PLoS Med · 2013 · PMC3672214 · PMID 23750121

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showed a trendno p-value reported

A recent meta-analysis of ten studies, with a total of 520 PD cases and 711 controls, showed a trend for lower serum iron levels in PD patients compared with controls, although the difference in iron levels was not statistically significant (standardized mean difference: −0.45; 95% CI −0.98 to 0.08; p = 0.09) [6] .

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