Duke University Press

Table 1

Means and standard deviations of Cox estimates of $d d_{h z}$ by sample size

Treatment at Calendar Time 60 Months			Treatment at Calendar Time 90 Months
Mean	SD	n	Mean	SD	n
0.10053	0.07082	5,000	0.10520	0.05503	5,000
0.09944	0.04310	10,000	0.10486	0.04064	10,000
0.10061	0.03242	20,000	0.10471	0.02771	20,000

Treatment at Calendar Time 60 Months			Treatment at Calendar Time 90 Months
Mean	SD	n	Mean	SD	n
0.10053	0.07082	5,000	0.10520	0.05503	5,000
0.09944	0.04310	10,000	0.10486	0.04064	10,000
0.10061	0.03242	20,000	0.10471	0.02771	20,000

Note: The simulated data were generated according to the proportional hazard DD in Eq. (3), with the baseline hazard $r_{0} (u)$ set equal to a constant $λ = 0.008$ ⁠; the regression coefficients $b_{1}$ ⁠, $b_{2}$ ⁠, and $d d_{h z}$ are assumed equal and set to 0.10; the start of observation, $τ_{1}$ ⁠, is set to 24 months; and $τ$ ⁠, the start of treatment, is set at 60 or 90 months.

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