BMI distribution in 51-80 years old women of the Basel Breast Cancer Database (BBCD) between 1990 and 2009 in comparison to women of the same age in the Swiss Health Surveys [SHS, corrected for self report (35)]1 1992, 1997, 2002, and 2007 (15). 1, Datasource of the SHS: Swiss Federal Office (FSO); 1997, underweight n=28; 2, weighted, with 95% CI.