Cases of acute hepatitis C by symptom onset date grouped by quarter and risk factor.

<p><b>Barcelona city, 2004─ 2015.</b> (A) Men. (B) Women. Diagnosis date was used instead of missing symptom onset dates in 52 cases, notification date was used instead of missing symptom onset and diagnosis dates in 52 cases. Mean months elapsed among symptom onset date and diagnosis date was 1.5 (standard deviation (sd) = 8.0; n = 77); mean months elapsed among diagnosis date and notification date was 2.5 (sd = 5.3; n = 129). Hepatitis C virus, HCV; incidence ratio, IR; years old, y.</p>