This is why the research has a comparison site to match the intervention for each community.
In addition, the optimal design for an intervention study is to match the intervention subjects to control subjects and have all data collected and analyzed simultaneously.
To minimise this problem, we will match the intervention classes with control classes (same grade and school), which corresponds to the matching procedure in field experiments.
Control practices provide usual care and match the intervention practices on the presence of different primary care professionals within the practice.
Finally, interviews with key management stakeholders were held, aiming to match the intervention to the present laws and legislation, collective labour agreement, and the policy of the airline company.
A detailed analysis of the videotapes will lead to refinements of the control (LSSM) protocol such that it more closely matches the intervention (CST) in terms of credibility and expectations of benefit.
Yet, as Bosch notes, 29 in many cases it is difficult to assess whether such tailoring was done based on a priori barrier identification, and explicit use of theory to match the intervention to the identified barriers.
Based on a list of Flemish nursing homes from the National Institute for Health and Disability Insurance (NIHDI), fifteen care homes which match the intervention nursing homes regarding to facility size, ownership and geographic region are contacted for participation in a control group.
These checks, however, should not be too difficult if Shepard and others 1 have additional unpublished data (e.g., the data that they used to match the intervention group to the control group), or if they collected more facility characteristics beyond these three or six variables before matching or used publicly available data from the Demographic and Health Surveys 5 or the 2002 Rwandan Census.
26 27 Our original literature search identified a cluster randomised controlled trial in 11-12 year olds and a quasi-randomised trial of 8-9 year olds, 28 29 both completed by the same group of researchers and of a similar intervention that matched the type of intervention we wanted to develop for use in the United Kingdom.
