Jørgensen CC, Jacobsen MK, Soeballe K, et al. Thromboprophylaxis only during hospitalisation in fast-track hip and knee arthroplasty, a prospective cohort study. BMJ Open 2013;3:e003965. The authors of this paper have found some mistakes in table 2. While all results, including those in table 2, are correct regarding the ‘early discharge’ cohort, the percentages and confidence intervals for the ‘unsuccessful’ early discharge cohort and the total cohort are incorrect. The authors believe this is due to a systematical error and have corrected the table below accordingly.⇓