Catherine A. Thornton

Learn More
BACKGROUND Health is a result of influences operating at multiple levels. For example, inadequate housing, poor educational attainment, and reduced access to health care are clustered together, and are all associated with reduced health. Policies which try to change individual people's behaviour have limited effect when people have little control over their(More)
BACKGROUND The vulnerability of clinical trials to volunteer bias is under-reported. Volunteer bias is systematic error due to differences between those who choose to participate in studies and those who do not. METHODS AND RESULTS This paper extends the applications of the concept of volunteer bias by using data from a trial of probiotic supplementation(More)
  • 1