Table 2.

Period and cohort curvature over and above net drift

European areaIncidence populationPeriod curvature
Cohort curvature
Δ Deviance*Δ dfPΔ Deviance§Δ dfP
A. Seminoma trends
    EasternCzech Republic3.110.0817.580.02
    NorthernDenmark1.320.5222.690.01
Norway6.270.5260.914<0.01
Sweden5.850.3243.712<0.01
United Kingdom**0.220.887.090.63
    SouthernItaly††0.210.6415.580.05
    WesternFrance‡‡3.520.1711.890.22
Switzerland1.210.2815.680.05
B. Nonseminoma trends
    EasternCzech Republic0.010.8821.280.01
    NorthernDenmark3.620.1616.690.05
Norway30.37<0.0111.8140.62
Sweden11.050.0515.4120.22
United Kingdom**3.320.1917.490.04
    SouthernItaly††0.010.856.580.60
    WesternFrance‡‡1.620.4513.090.16
Switzerland0.810.3815.680.05
  • Abbreviation: df, degree of freedom.

  • * Represents the difference in the deviance of the age + drift model and the age + drift + period model.

  • Represents the difference in the degrees of freedom of the age + drift model and the age + drift + period model.

  • To determine the goodness-of-fit, the change in deviance was compared with the χ2 distribution on the change in degrees of freedom between the models.

  • § Represents the difference in the deviance of the age + drift model and the age + drift + cohort model.

  • Represents the difference in the degrees of freedom of the age + drift model and the age + drift + cohort model.

  • Aggregation of Basel (1983-1997), Geneva (1983-1997), Neuchatel (1983-1996), St.Gall-Appenzell (1983-1997), Vaud (1988-1996), and Zurich (1983-1996).

  • ** Aggregation of England (1978-1997) and Scotland (1978-1997).

  • †† Aggregation of Florence (1985-1997), Varese Province (1983-1997), Parma Province (1983-1997), Ragusa Province (1983-1997), and Turin (1985-1997).

  • ‡‡ Aggregation of Bas-Rhin (1978-1997), Calvados (1978-1997), Doubs (1978-1997), Isere (1979-1997), Somme (1982-1997), and Tarn (1982-1997).