Number needed to treat with low-dose aspirin during 5 years to prevent one CVD event and number needed to cause a major bleeding event by baseline CAC score, overall (Panel A) and by sex (Panel B).
Results presented as number of persons. Follow-up was censored at 5 years. Red horizontal lines represent NNH thresholds. Participants with CAC ≥400 had zero bleeding events and the NNH could not be computed. The exploratory NNT for participants with CAC ≥400 was computed only overall.
Abbreviations: CAC = coronary artery calcium; CVD = cardiovascular disease; NNH = number needed to harm; NNT = number needed to treat