From: Higher incidence of premenopausal breast cancer in less developed countries; myth or truth?
Country | Postmenopausal (≥ 50) | Premenopausal (< 50) | ||
---|---|---|---|---|
Period | APC*(95% CI) | Period | APC*(95% CI) | |
Denmark | Â | Â | Â | Â |
 | 1975 – 1980 | -1.23 (-4.00 to 1.63) | 1975 – 2008 | 0.25 (0.05 to 0.46) ** |
 | 1980 – 2008 | 2.01 (1.80 to 2.23) ** |  |  |
Sweden | Â | Â | Â | Â |
 | 1975 – 1979 | 3.00 (1.44 to 4.59) ** | 1975 – 2008 | 0.94 (0.79 to 1.10) ** |
 | 1979 – 1985 | -1.10 (-2.17 to -0.03 ** |  |  |
 | 1985 – 1990 | 5.82 (4.22 to 7.45) ** |  |  |
 | 1990 – 1993 | -2.36 (-6.96 to 2.47) |  |  |
 | 1993 – 2002 | 2.63 (2.09 to 3.17) ** |  |  |
 | 2002 – 2008 | -1.30 (-2.10 to -0.49) ** |  |  |
Finland | Â | Â | Â | Â |
 | 1975 – 1984 | 2.32 (1.51 to 3.13) ** | 1975 – 1998 | 2.48 (2.18 to 2.77) ** |
 | 1984 – 1988 | 6.26 (1.75 to 10.96) ** | 1998 – 2008 | -1.20 (-2.19 to -0.19) ** |
 | 1988 – 2008 | 2.24 (2.00 to 2.84) ** |  |  |
Norway | Â | Â | Â | Â |
 | 1975 – 2003 | 0.62 (0.30 to 0.94) ** | 1975 – 2008 | 0.96 (0.77 to 1.16) ** |
 | 1993 – 1997 | 8.08 (2.83 to 13.60) ** |  |  |
 | 1997 – 2003 | 2.24 (-0.01 to 4.55) |  |  |
 | 2003 – 2008 | -2.21 (-4.37 to -0.01) ** |  |  |
US (whites) | Â | Â | Â | Â |
 | 1975 – 1982 | 0.89 (0.15 to 1.64) ** | 1975 – 1980 | -1.09 (-2.48 to 0.32) |
 | 1982 – 1987 | 5.54 (3.70 to 7.41) ** | 1980 – 1986 | 2.63 (1.18 to 4.09) ** |
 | 1987 – 1993 | -0.27 (-1.50 to 0.98) | 1986 – 2008 | -0.07 (-0.22 to 0.08) |
 | 1993 – 2000 | 1.69 (0.74 to 2.65) ** |  |  |
 | 2000 – 2004 | -3.79 (-6.42 to -1.08) ** |  |  |
 | 2004 – 2008 | -0.17 (-1.91 to 1.60) |  |  |
US (blacks) | Â | Â | Â | Â |
 | 1975 – 1978 | -2.65 (-9.10 to 4.26) | 1975 – 1991 | 1.32 (0.72 to 1.92) ** |
 | 1978 – 1986 | 4.64 (2.74 to 6.58) ** | 1991 – 2008 | -0.43 (-0.97 to 0.12) |
 | 1986 – 2008 | 0.67 (0.34 to 1.00) ** |  |  |