"The data for (us) are very useful ... This is especially important when evaluating the impact of interventions regarding alcohol or other areas, as the survey data are likely to provide an earlier indication than routine data sources."
Size doesn't matter- Evidence does.
Williams,A 2005. Size doesn't matter- Evidence does. Guernsey recently voted to ban all smoking in enclosed public and working places. One of the biggest contributors, that demonstrated the impact the smoking campaign was having, was the strong evidence-base from monitoring smoking levels amongst young people,. Education and Health 23(2),27-28. PDF