Birth weight and cognitive function in young adult life: historical cohort study

An authors’ error occurred in this paper by Henrik Toft Søreson et al (16 August, pp 401-3). The correct mean (SD) score for parity should have been 0-1: 43.6 (9.4); 2: 42.2 (9.7); ⩾3, 41.0 (10.1). These values did not lead to any errors in the risk calculations, and there were no consequences for any of the results.