Dutch researcher Mirjam Moerbeek used a Veni grant to investigate how best to design a study with nested data at a reasonable cost. An examples includes an intervention study aimed at reversing unhealthy lifestyles in young people. The question is how many schools and how many pupils per school should take part.

People who are obese and lead unhealthy lifestyles are more likely to suffer from a larger number of urinary problems, according to a population-based study of more than 5,000 men and women published in the May issue of the UK-based urology journal BJU International. Researchers hope the results will help clinicians to understand why problems occur and how they can be managed more effectively.