Table 1.

Characteristics of the total study population (N=1832)

	N*	%	Mean (SD)
Gender
Males	906	49	NA
Females	926	51	NA
Age, years	1832	100	61.5 (10.3)
Time of blood sampling
Before 12:00	378	21	NA
Between 12:00 and 17:00	1172	64	NA
After 17:00	274	15	NA
Unknown	8	0	NA
Hepcidin, nM†	1832	100	6.4 (2.6)
Ferritin, μg/L†	1830	100	107.2 (2.6)
Ratio hepcidin/ferritin, nmoles/μg†	1830	100	59.4 (1.9)
Ratio hepcidin/TS, nM/%†	1812	99	0.23 (2.6)
Iron, μM	1812	99	17.2 (5.6)
TS, %	1812	99	29.6 (10.3)
TIBC, μM	1812	99	59.2 (9.0)

N indicates number; NA, not applicable.

^*Numbers are different from the total number of included persons because of missing values.

^†The variables hepcidin, ferritin, ratio hepcidin/ferritin, and ratio hepcidin/TS were log-transformed, and therefore geometric mean and SD are given.

TIBC, total iron binding capacity; TS, transferrin saturation.