Table 7. Summary of study outcomes – Iron biomarkers vs. malaria risk, and outcomes not presented in forest plot.

Author, Year	Study Design	Biomarker(Outcome)	Exposure% (n or IQR)	Comparison to exposure% Outcome (n or IQR)	p-value
Engmann 2008 [41]	Cross-sectional	Serum ferritin (μg/L)	Peripheral parasitemia at enrollment Median 91 (IQR: 33, 157)	No peripheral parasitemia at enrollment Median 33 (IQR: 20, 50)	Not provided
Matteelli 1994 [42]	Cross-sectional	Serum ferritin (ng/mL)	Peripheral parasitemia at delivery Mean 65.7 (n = 106)	No peripheral parasitemia at delivery Mean 36.5 (n = 98)	p = 0.002
Ndyomugyenyi 2008 [61]	Cross-sectional	Serum ferritin (μg/L)	Peripheral parasitemia at enrollment (Means not available)	No peripheral parasitemia at enrollment (means not available)	p = 0.007
Saad 2012 [52]	Case-control	Serum ferritin (μg/L)	Peripheral parasitemia at enrollment (Uncomplicated malaria) Median 63.3 (IQR: 30.5, 113.2)	No peripheral parasitemia at enrollment Median 34.4 (IQR: 7.9, 60.3)	p = 0.041
		Serum ferritin (μg/L)	Peripheral parasitemia at enrollment (Severe malaria) Median 78.6 (IQR: 44.1, 148.9)	No peripheral parasitemia at enrollment Median 34.4 (IQR: 7.9, 60.3)	p = 0.002
Dreyfuss 2000 [46]	Cross-sectional	Erythrocyte Protoporhyrin (μmol/mol heme)	Peripheral parasitemia at enrollment Geometric mean 90 (CI 54, 150) (n = 57)	No peripheral parasitemia at enrollment Geometric mean 84 (CI 52, 134) (n = 231)	P = 0.3

CI: confidence interval. IQR: Interquartal range.