Effects of Green Tea Catechins and Theanine on Preventing Influenza Infection among Healthcare Workers: A Randomized Controlled Trial

Table 2 Results of multiple logistic regression analysis and Cox proportional hazards regression model

	Laboratory confirmed influenza^a		Clinically defined influenza^b
Variables	OR (95% CI)^c	P Value^c	OR (95% CI)^c	P Value^c	HR (95% CI)^d	P Value^d
Allocation
Catechin/Theanine	0.17 (0.01 to 1.10)	0.11	0.25 (0.07 to 0.76)	0.02	0.27 (0.09 to 0.84)	0.02
Placebo	1 [Reference]		1 [Reference]		1 [Reference]
Age	0.98 (0.91 to 1.04)	0.48	0.95 (0.91 to 0.99)	0.03	0.96 (0.92 to 1.00)	0.04
BMI	0.89 (0.63 to 1.16)	0.43	0.95 (0.79 to 1.11)	0.53	0.97 (0.83 to 1.13)	0.66

Abbreviations: OR, odds ratio; CI, confidence interval; HR, hazard ratio; BMI, body mass index.
^a Laboratory-confirmed influenza infection with viral antigen detected by immunochromatographic assay.
^b Clinically defined influenza was diagnosed as fever (temperature, ≥37.8°C) and any 2 of the following clinical symptoms: cough, sore throat, headache, or myalgia.
^c OR and P values were estimated using multiple logistic regression.
^d HR and P values were estimated using the Cox proportional hazards regression model.

ISSN: 2662-7671