What Difference Does a Day Make?

Missing data in daily diaries Why do we sometimes collect data from patients daily, rather than weekly or monthly? One of the main reasons is variability in the patient’s condition. Take the example of asthma. Over a week or a month, an asthma sufferer may experience...

How reliable can a single item be?

Meet Joanne. Jo has a nasty and persistent foot fungus, so agrees to take part in the trial of a new fungal cream. She is given a questionnaire and asked to rate her fungal problem on a 0-10 scale at the start of the trial, and then again when it’s over. At that...

ISOQOL 31st Annual Conference

Piper will be attending the 31st Annual Conference of the International Society for Quality of Life Research in Cologne from 13th October to 16th October. She will be speaking on Navigating Digital Health Technologies and Broadening the Scope of Health Outcomes...

Case Study: Item Response Theory

What do you do if your carefully-constructed questionnaire is not detecting change in a treatment group? Often this is because of the way that the questionnaire items are weighted. Fortunately, we can use Item Response Theory to develop a more sensitive scoring...

Case Study: Digital Health Technology

What happens when you have a treatment that is beneficial according to all measures, apart from the daily step count data generated by digital technology? We can help you to resolve this problem by taking the data analysis a step further. Taking Analysis a Step...