December 2020

Volume 37, Issue 4

Recruitment and Consent in an observational study

Authors: Michaela Goodwin William Whittaker Tanya Walsh Richard Emsley Matthew Sutton Martin Tickle Michael Kelly Iain Pretty
doi: 10.1922/CDH_000682020Goodwin06


Objective: The study sought to explore the consent rate and associated potential bias across a cohort in a large longitudinal population based study. Research design: Data were taken from a study designed to examine the effects of the reintroduction of community water fluoridation on children’s oral health over a five-year period. Children were recruited from a fluoridated and non-fluoridated area in Cumbria, referred to as Group 1 and Group 2. Results: Data were available for 3138 individuals. The consent rate was 12.91 percentage points lower in Group 2 than Group 1 (95% CI -16.27 to -9.56, p<0.001). The population in Group 2 was more deprived (higher Index of Multiple Deprivation (IMD)) than Group 1 before consent was taken. Consent was not associated with deprivation in either group. Conclusion: The cohort appeared to be unaffected by IMD-related non-consent. However there was a difference in consent rate between the two groups. With the population in Group 1 being more deprived than Group 2, it will be important to incorporate these differences into the analysis at the end of this longitudinal study. Keywords: Public health, consent, bias, deprivation, water fluoridation


Other articles in this issue

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Editorial: The impact of COVID-19 on population oral health 236-238 Download
Editorial: The impact of the COVID-19 pandemic on dentistry 239-241 Download
The current referral patterns for temporomandibular joint disorders (TMD) in Greater Manchester 242-246 £10 single article
Oral Health Inequalities in 0-17-year-old Children Referred for Dental Extractions Under General Anaesthesia in Wolverhampton 247-252 £10 single article
Temporomandibular dysfunction among working Australian adults and association with workplace effort-reward imbalance 253-259 £10 single article
Barriers and facilitators to health visiting teams delivering oral health promotion to families of young children: a mixed methods study with vignettes 260-268 £10 single article
Experience of collaboration at a family centre for preschool children in Sweden 269-274 £10 single article
Dental Public Health Education in Europe: a survey of European Dental Schools to determine current practice and inform a core undergraduate programme 275-280 £10 single article
Caries prevalence in 6- to 10-year-old German schoolchildren with and without disability 281-286 Download
Recruitment and Consent in an observational study 287-292 Download
Enamel development defects and oral symptoms: A hierarchical approach 293-298 £10 single article


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