Expression levels of all panel data were ascertained by quantitative PCR.
Although falls were retrospectively retrieved from an institutional incident reporting database, all other data were ascertained prospectively.
Almost all physical activity data were ascertained using self-report questionnaires, with considerable reliance on single-item questions 24,26,30,32,35 38,40 (n=9) and custom questionnaires 22,27,29,31,33,39 (n=6) of unknown validity.
Dispensing data were ascertained for all forms of oestrogen: oral, transdermal patch, and vaginal creams and rings listed in the Saskatchewan Formulary.
The data were ascertained from birth certificates from all hospitals and birth centers in the state.
Case data were ascertained from the population-based Northern Congenital Abnormality Survey and control data from national data on all births.
Sex hormone binding globulin levels were measured from serum samples that had been collected in the first trimester, and clinical data were ascertained from prospectively collected electronic medical records.
Demographic and socioeconomic data were ascertained through a structured questionnaire.
18 Mortality data were ascertained to the end of 2009.
Analyses included only patients where data were ascertained (denominator data are provided in tables).
