Components of Variance and Intraclass Correlations for the Design of Community-based Surveys and Intervention Studies: Data from the Health Survey for England 1994Martin Gulliford, S Chinn, Obioha C. Ukoumunne|American Journal of Epidemiology|1999Cited by 851
Patterns of intra-cluster correlation from primary care research to inform study design and analysisGeoffrey G. Adams, Michael J. Campbell, Martin Gulliford et al.|Journal of Clinical Epidemiology|2004Cited by 605
Methods for evaluating area-wide and organisation-based interventions in health and health care: a systematic review.Obioha C. Ukoumunne, Peter Burney, Martin Gulliford et al.|PubMed|1999Cited by 511
The influence of patients' hopes of receiving a prescription on doctors' perceptions and the decision to prescribe: a questionnaire surveyNicky Britten, Obioha C. Ukoumunne|BMJ|1997Cited by 343
The association between child and adolescent depression and poor attendance at school: A systematic review and meta-analysisKatie Finning, Darren Moore, Obioha C. Ukoumunne et al.|Journal of Affective Disorders|2018Cited by 224