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Table 1 Characteristics of the Stockholm and Singapore breast cancer cohorts

From: Do Asian breast cancer patients have poorer survival than their western counterparts? A comparison between Singapore and Stockholm

Characteristic Stockholm Breast Cancer Registry Singapore Cancer Registry
Period of diagnosis 1980 to 1999 1980 to 1999
Number of breast cancer cases 17,090 10,287
   1980 to 1989 (%) 7,932 (46) 3,135 (30)
   1990 to 1999 (%) 9,148 (53) 7,152 (70)
Median age at diagnosis (years) 62 50
   Standard deviation 14 13
   Range (years) 18 to 101 12 to 98
   Diagnosed ≤ 50 years old (%) 4,247 (25) 5,360 (52)
   Diagnosed >50 years (%) 12,843 (75) 4,927 (48)
Number of women with information on disease stagea (%) 16,869 (99) 6,569 (64)
   1980 to 1989   
Local cancer (%) 6,047 (77) 1,090 (48)
Regional cancer (%) 1,667 (21) 961 (43)
Distant cancer (%) 165 (2) 196 (9)
   1990 to 1999   
Local cancer (%) 7,387 (82) 2,283 (53)
Regional cancer (%) 1,358 (15) 1,692 (39)
Distant cancer (%) 245 (3) 347 (8)
Estrogen receptor status   
   Positive 9,874 (77) Not available
   Negative 2,984 (33) Not available
Number of deaths (%) 9,330 (55) 4,782 (46)
Number of breast cancer deaths (%) 4,050 (24) 2,684 (26)
  1. aInvasive cancers are local stage if they are confined entirely to the breast. Regional cancers are those that have extended beyond the limits of the breast directly into surrounding tissues or organs, or into lymph nodes in the region. Distant cancers are those that have spread beyond these localizations.