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Table 2 Frequencies and odds ratio of risk factors by acute hepatitis A cases and controls (hepatitis B and C cases occurred in 2008–2009)

From: Hepatitis A in Puglia (South Italy) after 10 years of universal vaccination: need for strict monitoring and catch-up vaccination

Risk factors Hepatitis A Controls (hepatitis B and C) OR 95% CI
Contact with a jaundice case 1 (1%) 0 (0%) - -
Shellfish consumption 83 (85%) 4 (23%) 19.2 4.8-83.2
Raw shellfish consumption 78 (80%) 3 (18.0) 19.1 4.4-94.3
Travel 25 (26%) 2 (12%) 2.6 0.5-17.7
Household of day-care child 12 (12%) 3 (18%) 0.66 0.1-3.3
Intravenous drug use 1 (1%) 0 (0%) - -
Well-water drinking 3 (3%) 1 (6%) 0.51 0.0-13.58