Sandrine Rudaz

Learn More
BACKGROUND Tracing mail survey responses is useful for the management of reminders but may cause concerns about anonymity among prospective participants. We examined the impact of numbering return envelopes on the participation and the results of a survey on a sensitive topic among hospital staff. METHODS In a survey about regrets associated with(More)
CONTEXT Advance directives or proxy designations are widely recommended, but how they affect doctors' decision making is not well known. OBJECTIVES The aim of this study was to quantify the influence of advance directives and proxy opinions on doctors' decisions. METHODS We mailed to all the generalists and internists in French-speaking Switzerland (N =(More)
OBJECTIVES To explore characteristics of clinical trials that influence the choice of the noninferiority margin (NIM) when planning the trial. STUDY DESIGN AND SETTING We conducted an experimental survey among corresponding authors of randomized controlled trials indexed in MEDLINE. We described two hypothetical studies and asked the respondents' opinion(More)
BACKGROUND Many medical research projects encounter difficulties. The objective of this study was to assess the self-reported frequency of difficulties encountered by medical researchers while conducting research and to identify factors associated with their occurrence. METHODS The authors conducted a cross-sectional survey in 2010 among principal(More)
CONTEXT Sometimes a written advance directive contradicts the opinion of a health care proxy. How this affects doctors' decision making is unknown. OBJECTIVES To quantify the influence of contradictory instructions on doctors' decisions. METHODS All the generalists and internists in French-speaking Switzerland were mailed the questionnaire. Respondents(More)
BACKGROUND There is currently no guidance for selecting a specific difference to be detected in a superiority trial. We explored 3 factors that in our opinion should influence the difference to be detected (type of outcome, patient age group, and presence of treatment side-effects), and 3 that should not (baseline level of risk, logistical difficulties, and(More)
The objectives of the study were to assess patients' intent to participate in a hospital-based biobank and to explore the factors associated with higher participation. A 23-item questionnaire was developed to survey a random sample of patients in a Swiss university hospital. Two vignettes describing hypothetical biobanks were incorporated in the survey and(More)
  • 1