Corrigendum: Mental health in UK Biobank: Development, implementation and results from an online questionnaire completed by 157 366 participants (BJPsych Open (2018) 4:3 (83-90) DOI: 10.1192/bjo.2018.12)

It has recently come to our attention that the above paper contains an error. One of the variables in table 3 labelled "moderate activity ≥ three times a week", and also referred to in the text as "Achieving recommended levels of physical activity", was extracted incorrectly. Please see below an updated version of table 3 with the changes highlighted. The numbers of participants who are positive for this measure is much reduced, but our conclusion that there was no difference between the groups is unchanged. The authors apologise for this error. (Table Presented).