Table 3. Variables affecting adult worm specific IgG levels.

	Dependent variable
Independent variable	Total IgG	IgG1	IgG2	IgG3	IgG4
Sex	2.695 (M>F)	0.687 (M>F)	0.377 (M<F)	0.006 (M<F)	1.063 (M>F)
Age group	4.382 (1>2<3)	8.068 (1<2<3)	3.632 (1<2<3)	2.699 (1<2<3)	8.772 (1<2<3)
Infection status	9.040 (sh−<sh+)	5.302 (sh−<sh+)	0.782 (sh−<sh+)	1.520 (sh−<sh+)	2.152 (sh−<sh+)
Age group* Infection status	3.525	2.718	0.256	2.200	0.564

F values from ANOVA for relationship between antibody and variables. Model accounts for variation in sex (male (M) or female (F)), age group (1∶5–10 years; 2: 11–15 years; 3: >16 years), and infection status (uninfected: sh−; infected: sh+). The interaction term is designated by *. Direction of differences between variables is indicated in brackets below F value. Significant F values (p≤0.05) are indicated in bold.