TABLE 1.

Correlation between levels of antibodies to PfMSP1 constructs and age in Ghanaian children

Antigen construct	Low-transmission season						High-transmission season
	All samples			Positive responses only			All samples			Positive responses only
	rs	P(rs)	n	rs	P(rs)	n	rs	P(rs)	n	rs	P(rs)	n
Wellcome 19	0.09	0.13	266	0.04	0.69	83	0.01	0.86	266	−0.02	0.88	78
Wellcome EGF1	0.04	0.56	266	0.16	0.30	45	0.09	0.16	266	−0.02	0.90	44
MAD20 EGF1	0.00	0.94	265	0.22	0.17	36	−0.06	0.38	265	0.05	0.74	37
MAD20 EGF2	0.04	0.52	265	−0.01	0.77	10	−0.03	0.63	265	−0.15	0.59	14

^ar_s, Spearman rank correlation coefficient; P(r_s), associated level of significance; N, number of samples tested.