We anticipate that 70% of "cases" will agree to participate, so that 121 "cases" and 242 matching control families can be invited for complementary interviews.
Reduction of rating and ranking errors in doubtful cases was achieved by complementary interviews with those involved more personally in the medical care of the patients.
The need for complementary interviews with farmers, hauliers etc. will vary depending on the amount of missing data and time from the movement occurred until data is available in the database.
Finally, to assess problems in axis IV of DSM-IV-TR (psychosocial disorders), a complementary diagnostic interview was carried out, in which the problems relating to that axis were analyzed (family of origin, created family, school, work, home, economic, health and legal).
Complementary patient interviews also identified ready-to-eat green salads bought at one retailer as the likely outbreak source.
The chosen methodology is using two complementary methods: interviews of personnel performing safety reviews, and analysis of safety review reports from 2005 to 2009.
Complementary qualitative interviews can then be conducted to understand the resources (among which infrastructures) involved in the production process (made of "transformation activities" and "circulation activities") as well as the coordination mechanisms between actors (beyond the classical ones by the prices or the rules or institutions).
The study design incorporated an audit of case notes on a sample of deaths occurring over a 12 month period and complementary group interviews with healthcare professionals.
Interviews were conducted by research team members experienced in qualitative interviewing; two researchers with complementary backgrounds conducted each interview using a standard interview guide (figure 1) either in person or via telephone.
For these therapies, the scope was narrowed to ask "Have you ever seen a provider for…" rather than "Have you ever used…" This better matched the way respondents described using complementary therapies during interviews.
