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Table 1 Fitted Poisson models that compare the hazard rate functions of the USA and Catalonia (Cat).

From: Estimation of age- and stage-specific Catalan breast cancer survival functions using US and Catalan survival data

Comparison Stage β 0 β 1 Cov(β 0, β 1)
   Coef. SE Coef. SE  
Cat 1980–89 vs USA 1975–79 Localized 0.5511 0.0786 - - -
  Regional 0.2392 0.0938 0.1797 0.0610 -0.0048
  Distant 0.2667 0.0898 - - -
Cat 1990–2001 vs USA 1975–79 I -2.9278 0.9619 1.0937 0.5068 -0.4706
  II- -1.1482 0.4722 0.5589 0.2776 -0.1223
  II+ -0.8711 0.2304 0.3902 0.1417 -0.0299
  III - - - - -
  IV -0.4499 0.1313 0.3840 0.1125 -0.0092
Cat 1990–2001 vs USA 1990–2001 I - - - - -
  II- -0.5765 0.4614 0.5387 0.2703 -0.1160
  II+ -0.1054 0.2240 0.2837 0.1370 -0.0279
  III - - - - -
  IV -0.2916 0.1300 0.3127 0.1095 -0.0087
  1. Note: The hazard ratios are obtained using the expression . When coefficients are not reported ("--") means that they were not statistically significant. Catalan data refer to the Girona Cancer Registry data.