Table 1.

Inferences from the crude estimators of six risk differences (RD) at 12 quarters. For each crude RD estimator, the point estimate, standard error, the estimate of the lower and upper bound of the 95 % confidence interval, and the associated p-value are denoted by ${\psi }_n^{{\theta }_1,{\theta }_2}$, ${\mathrm{\Gamma }}_n^{{\theta }_1,{\theta }_2}$, ${\psi }_n^{{\theta }_1,{\theta }_2,-}$, ${\psi }_n^{{\theta }_1,{\theta }_2,+}$, and p, respectively.

θ1	θ2	${\psi }_n^{{\theta }_1,{\theta }_2}$	${\mathrm{\Gamma }}_n^{{\theta }_1,{\theta }_2}$	${\psi }_n^{{\theta }_1,{\theta }_2,-}$	${\psi }_n^{{\theta }_1,{\theta }_2,+}$	p
8.5	8	1.3e-03	1.5e-03	−1.6e-03	4.2e-03	0.386
8.5	7.5	2.8e-03	3e-03	−3.2e-03	8.8e-03	0.357
8.5	7	0.0335	0.0111	0.0116	0.0553	3e-03
8	7.5	1.5e-03	2.7e-03	−3.7e-03	6.8e-03	0.574
8	7	0.0322	0.0111	0.0105	0.0538	4e-03
7.5	7	0.0307	0.0108	9.6e-03	0.0518	4e-03