Symptomatic malaria diagnosis overestimate malaria prevalence, but underestimate anaemia burdens in children: results of a follow up study in Kenya

Table 3 Differences in the prevalence of malaria in patients based on presumptive and laboratory diagnosis in the same cohort

Age (Months)	The prevalence of malaria based on presumptive diagnosis	Prevalence of malaria after laboratory diagnosis	P-value	Prevalence of anaemia after laboratory diagnosis
< 6 (n = 34)	70.6	31.2	< 0.001	19.6
6 – 12 (n = 223)	47.1	34.8	< 0.001	20.7
12.1 – 24 (n = 202)	73.8	35.4	< 0.001	35.3
24.1 - 60 (n = 178)	66.3	41.0	< 0.001	30.3
60.1 – 144 (n = 108)	72.2	38.8	< 0.001	34.7
> 144 (n = 142)	63.4	34.9	< 0.001	30.7

Reported also are prevalence of anaemia in the same age group after laboratory analysis. No diagnosis of anaemia was done during presumptive diagnosis.

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