Table 2.

Incidence of upper respiratory tract infection throughout the study.

	Control yogurt n = 61	Qingrun yogurt n = 62	OR (95% CI)	p-value
Incidence of common cold	28 (45.9%)	15 (24.2%)	0.38 (0.17, 0.81)	0.013
Incidence of influenza-like illness	13 (21.3%)	5 (8.1%)	0.32 (0.11, 0.97)	0.045

Data are presented as frequency (percentage).

Group deference was evaluated by using logistic regression.

OR: odd ratios; CI: confidence interval.