Compliance with second hepatitis B vaccine dose*

ParticipantsEnhanced follow up EERPostal reminders CERRBI (95% CI)ABI |EER-CER|NNT (CI)
*Abbreviations defined in glossary; RBI, ABI, NNT, and CI calculated from data in article.
Not returned by 6 weeks48%25%92% (21 to 217)23%5 (3 to 14)
All participants72%60%20% (1.8 to 46)12%9 (4 to 87)