Table 5. Median (IQR) of ferritin level and prevalence of iron deficiency anemia given different adjustment methods.

Correction method N = 107	Median (IQR) Ferritin (µg/L)	Iron deficiency anemia n (%)
		No	Yes
Ferritin not adjusted	25.7 (25.7–59.6)	87 (81.3)	20 (18.7)
Exclusion approach	25.2 (12.8–35.3)	65 (77.4)	19 (22.6)
Correction Factor approach	24.5 (12.6–34.6)	82 (76.6)	25 (23.4)
Higher ferritin-cut-off adjustment	25.7 (25.7–59.6)	80 (74.8)	27 (25.2)

Note:

CI, confidence interval; IQR, inter quantile range; µg/L, Micrograms per Litre.