Table 2. Incidence of all-cause and malaria-specific illness¹.

	Immediate	Delayed	p2
All-cause illness visit
Period prevalence3	25/50	16/50	0.07
Incidence rate4	36/378	19/351	0.03
Malaria visit
Period prevalence	12/50	8/50	0.32
Incidence rate	13/378	9/351	0.49

¹As assessed by sick-child visits to hospital clinic in the 56-day follow-up period of a recent iron therapy trial that compared the effect on iron status outcomes of iron started concurrently with vs. 28 days after antimalarial treatment in 100 Ugandan children 6–59 months old with malaria and anemia;

²P-value from chi-square for period prevalence and Poisson regression for incidence rate;

³Period prevalence = children with at least one sick visit in the follow-up period/children enrolled at beginning of study;

⁴Incidence rate = total number of sick visits in follow-up period/person weeks.