Using Cox regression and adjusting for age at interview, year of interview, dialect group, education, family history of breast cancer, age when periods became regular, parity, menopausal status, body mass index (BMI), n-3 fatty acid, and other covariates, we found breast cancer risk was reduced significantly in association with high soy intake.
We adjusted simultaneously for age at interview (years), gender, dialect group (Hokkien, Cantonese), body mass index (BMI), year of recruitment, level of education (no formal education, primary school, secondary school or above) and daily intakes of ethanol (grams), fruits, vegetables and juices (grams), as well as daily dietary intakes of β-cryptoxanthin (μg) and isothiocyanates (μmol).
Adjusted models were constructed in this manner: Model 1 was adjusted for age, sex, dialect, and interview year.
Covariates included in model I were baseline age (<50, 50 54, 55 59, 60 64, ≥65), year of interview (1993 1995 and 1996 1998), dialect (Hokkiens vs. Cantonese), sex, education (none, primary, secondary or higher), smoking (never, ever), any moderate or strenuous physical activity (yes vs. no), history of physician-diagnosed hypertension (yes vs. no), and total energy intake (kcal/day).
The study was conducted by female interviewers familiar with the interview protocol, cultural traditions and dialects in the camps.
A voice recorder tape was used to record the sessions and an independent researcher transcribed the interviews in the local dialect.
The researchers, focusing on distinct oral languages, not dialects, interviewed and made recordings of the few remaining speakers of a language and collected basic word lists.
Interviews were mostly conducted in the local Akan dialect(s), while the interview protocols were prepared in English.
Feedback from these patients confirmed that most of the findings presented their point of view and only clarification on minor misunderstandings of patients' words was done because of the use of dialect during the interview.
Over the next week, at least two more letters from Ferrante quickly revealed by Edizioni E/O to be fakes appeared in Italian newspapers, as did a fake interview that made Ferrante a dialect-speaking, bearded old lady hitting on her young Neapolitan interviewer.
For low literates, the interview was conducted in their local dialect by trained research assistant who could communicate in that language.
