Table 1 Age-adjusted mortality rate ratio and relative index of inequality for breast cancer mortality according to 5 year calendar periods

1983-1987

0.66 (0.54-0.82)

0.67 (0.54-0.82)

1 (reference)

0.84 (0.68-1.03)

1988-1992

0.60 (0.51-0.70)

0.63 (0.54-0.73)

1 (reference)

0.72 (0.60-0.85)

1993-1997

0.96 (0.84-1.10)

1.03 (0.91-1.16)

1 (reference)

0.92 (0.80-1.07)

1998-2002

0.86 (0.77-0.96)

0.87 (0.79-0.95)

1 (reference)

0.88 (0.77-1.00)

2003-2007

1.38 (1.25-1.52)

1.05 (0.97-1.13)

1 (reference)

1.45 (1.29-1.63)

2008-2012

1.31 (1.19-1.43)

0.91 (0.86-0.97)

1 (reference)

1.23 (1.10-1.36)

p value for trend

<.0001