Table 1. Prevalence of late-onset and child-onset persistent ADHD using different informants, operationalisations and measures.

	Late-onset ADHD	Child-onset persistent ADHD
SDQ cut-points: self-reports#	14.4%	5.9%
SDQ cut-points: parent-reports	5.3%	5.6%
Latent trajectories: SDQ	8.2%	5.3%
Latent trajectories: DAWBA	4.8%	1.9%

SDQ = Strengths and Difficulties Questionnaire, DAWBA = Development and Well-Being Assessment.

^#Self-reports in adulthood, parent-reports for prior assessments. Trajectory analyses based on parent-report. Cut-point based definitions using multiple imputation with inverse probability weighting, trajectory definitions using full information maximum likelihood.