Table 2.

Examination of variables according to age.

Variable	Test	P-value	Decision
IgG	ANOVA	0.000	Difference present (it increased with age, except for the 0- to 1-month age group; the highest value was found in the 16- to 18-year age range)
IgA	Kruskal–Wallis test	0.567	No difference
IgM	ANOVA	0.000	Difference present (while the highest value was found in the 16- to 18-year age range, the lowest was found in the 0- to 1-month age group)
IgG1	ANOVA	0.000	Difference present (while the highest value was found in the 16- to 18-year age range, the lowest was found in the 3- to 5-year age group)
IgG2	Kruskal–Wallis test	0.011	Difference present (the value increased with age)
IgG3	Kruskal–Wallis test	0.066	No difference
IgG4	Kruskal–Wallis test	0.186	No difference

ANOVA: Analysis of variance IgG; Immunoglobulin G, IgA: Immunoglobulin A, IgM: Immunoglobulin M