Table 1 Odds ratios (OR) and 95% confidence intervals (CI) for all comparisons of mortality associated with the intervention period, both within the Femina cohort (actual study), outside the study area (trends unrelated to study), and between the study area and the rest of Norway, stratified by the data sources available for the comparison.

Femina area: Intervention period vs. pre-intervention period

Rest of Norway: Intervention period vs. pre-intervention period

Femina area vs. rest of Norway prior to intervention period

Femina area vs. rest of Norway during intervention period