TABLE 3.

Partial correlation coefficients for filaria-specific antibody levels and individual host infection intensities in different age classes of the examined population in Masaika

Ages (yr)	n	% Positive	Partial correlation coefficienta
			IgG1	IgG2	IgG3	IgG4	IgE
Age association with microfilaremia intensity
1-9	171	5.3	−0.099	−0.028	−0.074	0.265**	−0.071
10-19	204	22.5	−0.392***	−0.003	−0.027	0.157*	−0.071
20-39	258	31.0	−0.240***	−0.233***	−0.082	0.270***	−0.059
40-59	111	40.0	−0.249**	−0.245***	0.069	0.367***	−0.019
≥60	69	43.5	−0.152	−0.189	−0.069	0.288*	0.016
All	817		−0.286***	−0.128***	−0.034	0.312***	−0.044
χ2b			9.86*	8.74	2.01	3.94	0.57
Age association with antigenemia levels
1-9	171	21.1	0.008	−0.130	−0.110	0.537***	−0.133
10-19	204	51.0	−0.275**	−0.096	−0.064	0.533***	−0.273**
20-39	258	60.9	−0.314**	−0.179**	−0.121	0.497***	−0.140*
40-59	111	73.9	−0.221*	−0.227*	−0.006	0.495***	−0.183
≥60	69	68.1	−0.068	−0.234	−0.205	0.453***	−0.063
All	817		−0.266***	−0.134***	−0.085*	0.558***	−0.157***
χ2b			13.76**	2.02	2.11	0.92	3.64

^a***, P < 0.001; **, P < 0.01; *, P < 0.05.

^bTest for homogeneity of correlation coefficients.