Now try this activity.
What might be problematic with these descriptions of methods, or with the methods themselves?
Type your thoughts into the boxes then press 'Click for feedback' to view possible answers.
1. We measured how often nurses ask patients whether they smoke
Problems include: it relies on the nurses remembering accurately, and being honest
2. We compared a new wound care product with usual care
Problems include: what does usual care consist of? And is it the same for all patients?
3. We asked 100 teenagers to participate in our survey of healthy eating
Problems include: how many actually took part? How old were they? Were they male or female?
4. To assess the value of an educational leaflet, we gave the intervention group a leaflet and a telephone help line number
Problems include: by giving the intervention group the telephone help line number as well as the leaflet, it’s not clear what you’re assessing