Table 3.

Estimates of S(t) for t = 2.5 years in two treatment groups from ACTG Protocol 175 using a Kaplan Meier estimator, Ŝ_KM(t), the proposed estimator using Z information only, Ŝ^Z(t), T_𝕊 information only, Ŝ^Z(t), and Z and T_𝕊 information, ${Ŝ}_{\mathrm{L}\mathrm{M}}^{\mathbf{W}}(t)$, with corresponding standard error from the perturbation-resampling method (SE).

	ŜKM(t)	Ŝz(t)	${Ŝ}_{LM}^{T_{𝕊}}(t)$	${Ŝ}_{LM}^{\mathrm{W}}(t)$
Treatment: Zidovudine
Estimate	0.92	0.93	0.93	0.93
SE	0.0114	0.0108	0.0107	0.0105
Treatment: Zidovudine and Zalcitabine
Estimate	0.95	0.96	0.95	0.95
SE	0.0101	0.0091	0.0094	0.0091