Table 7.

Summary of logistic regression analysis to discriminate FD, FHD (I–II) patients from FHD (III–IV) patients according to the 1997 classification

Variable	Odds ratio	Confidence limits at 95%
		Inferior	Superior
Illness phase: Defervescence or toxic vs febrile	0.27	0.10	0.46
Antibody response: Primary vs secondary	0.11	0.03	0.32
Viremia level: <3.5 vs >3.5 (Log10 copies/μL)	0.69	0.35	1.36
Platelet count: <35,000 vs >35,000/μL	0.38	0.21	0.70