With great interest we read ‘Depression follow-up monitoring with the PHQ-9: open cluster-randomised controlled trial’ by Kendrick et al.1 In this study the researchers investigated whether the use of the PHQ-9 questionnaire, a patient-reported outcome measure, improves the outcomes of patients with depressive problems in general practices. The authors conclude that there is no evidence for improved depression outcomes when the PHQ-9 is used. We …