Table 2.

Results of Comparison of CA [1989–2004] with the US [1987–2002] (σ_12t = 213.5) in annual percent changes (APC) of age-adjusted breast cancer mortality rates; ${\widehat{\mathit{APC}}}_k=100(e^{{\stackrel{\sim }{\beta }}_{k1}}-1)$ and ${\stackrel{\sim }{\mathit{APC}}}_k=100(e^{{\stackrel{\sim }{\beta }}_{k1}}-1)$.

	California	United States
$\widehat{\mathit{APC}}(\text{SE})$	−2.33 (0.127)	−1.93 (0.127)
$\stackrel{\sim }{\mathit{APC}}(\text{SE})$	−2.33 (0.084)	−1.94 (0.027)
ZWLS	−4.94	p-value=0.000000757
ZCT	−2.37	p-value= 0.017372