Table 3. Comparison of pre-existing antibody titers in terms of disease severity.

Antibody titers	Asymptomatic cases (Median (min–max))	Mild cases (Median (min–max))	Severe cases (Median (min–max))	p
Measles Ig G titers	3,996.90 (263.60–39,643.00)	10,577.00 (684.00–453,211.00)	6,762.60 (1,462.80–38,254.00)	0.314
Rubella Ig G titers	79.15 (29.50–300.90)	108.20 (1.30–217.50)	95.05 (29.00–202.20)	0.897
Mumps Ig G titers	960.80 (402.80–6,060.30)	1,252.30 (291.40–9,445.30)	1,213.40 (361.00–3493.80)	0.820
Pneumococcus Ig G titers	2.01 (0.21–7.38)	0.50 (0.17–9.53)	0.45 (0.16–1.28)	0.021
DiphtheriaIg G titers	0.38 (0.03–1.22)	0.18 (0.02–1.38)	0.18 (0.01–0.97)	0.551
B. Pertussis Ig G titers	37.95 (12.90–85.30)	17.00 (4.50–511.20)	36.15 (12.80–66.70)	0.014
TetanusIg G titers	1.65 (0.00–5.40)	1.10 (0.00–9.70)	1.40 (0.00–6.30)	0.740
Varicella Ig G titers	3.84 (1.34–6.28)	2.92 (1.10–5.09)	2.57 (0.66–4.86)	0.237
H. influenza BIg G titers	62.25 (17.30–299.00)	70.30 (5.00–965.60)	53.50 (9.40–1,522.60)	0.993

Notes:

min: minimum; max: maximum.

The parameters that were statistically significant in the comparison of the groups were indicated with bold.