Effect of Seasonality and Ecological Factors on the Prevalence of the Four Malaria Parasite Species in Northern Mali

Table 1

Study population repartition by age group in May 2004 (Dry season) and in February 2005 (Cold season).

	0–9 years old						>9 years old
Sites of study	May 2004		February 2005				May 2004		February 2005
	N	(%)	N	(%)	P	Total	N	(%)	N	(%)	P (χ ^2 test)	Total
Tidarmène-Ikadewane	47	52.5	132	57.4	0.602	108	61	56.5	98	42.6	0.113	230
Ménaka	203	62.2	44	37	0.001	326	123	37.7	75	63	0.0005	119
Inékar	45	32.8	42	36.2	0.815	113	68	60.2	74	63.8	0.693	116
Anuzegreen	40	36.7	230	66.7	0.0004	109	69	63.3	115	33.3	0.00004	345
Tagalalt	37	33.3	41	28.9	0.762	111	74	66.7	101	71.1	0.473	142
Andéramboukane	44	20.2	33	28.7	0.484	218	174	79.8	82	71.3	0.104	115
N’gouyas	71	61.7	34	28.6	0.001	115	44	38.3	85	71.4	0.0002	119
Tin-abaw	59	51.3	24	20.9	0.012	115	56	48.7	91	79.1	0.0001	115
Tabangout	29	25.7	39	34.2	0.41	113	84	74.3	75	65.8	0.245	114
Total	575	43.3	619	43.7	0.868	1328*	753	56.7	796	56.3	0.866	1415*

*Those numbers are different from the populations we screened because we pulled out the subjects having age as missing value.
In overall, there was not a significant difference among the children less than 9 years of age between May 2004 and February 2005 (𝑃=0.868). In addition, the same observation was also noticed among subjects more than 9 years of age (𝑃=0.866). Subjects between 0 and 9 years of age were comparable during the 2 passages (May 2004 and February 2005) with a 𝑃value=0.868. Similarly, subjects with age greater than 9 years were also comparable between the 2 passages (May 2004 and February 2005) with 𝑃value=0.866.