Table 3.

Random effects Poisson regression model outputs for analysis of risk factors of fever.

	Any (≥37.1℃)		Grade-2 (37.6-39.0℃)
Variables	IRR (95%CI)	P	IRR (95%CI)	P
Group2 (low-dose VS placebo)	0.713(0.575-0.884)	0.002	0.996(0.615-1.612)	0.986
Group3 (high-dose VS placebo)	0.673(0.551-0.822)	<0.001a	1.442(0.966-2.152)	0.073b
Sex (male VS female)	2.932(2.427-3.541)	<0.001	7.624(4.686-12.404)	<0.001
Agegroup	1.071(0.984-1.166)	0.113	0.783(0.668-0.919)	0.003
BMI	1.034(0.999-1.070)	0.054	0.667(0.613-0.726)	<0.001
Base-temperature	2.177(1.635-2.900)	<0.001	2.842(1.581-5.107)	<0.001
Time	1.003(1.003-1.003)	<0.001	1.006(1.004-1.008)	<0.001

^aP = 0.607 for high-dose group versus low-dose group.

^bP = 0.089 for high-dose group versus low-dose group.