Effect of the number of removed lymph nodes on prostate cancer recurrence and survival: evidence from an observational study

Table 6 Overall survival

	Nodes group	t=60 month			t=90 month			t=110 month
		Mean	95% C.I.		Mean	95% C.I.		Mean	95% C.I.
Unweighted KM	1 (1-10)	0.969	0.953	0.985	0.947	0.918	0.977	0.934	0.895	0.974
	2 (11-20)	0.963	0.948	0.977	0.934	0.910	0.959	0.900	0.863	0.939
	3 (21+)	0.970	0.947	0.993	0.945	0.905	0.987	0.906	0.842	0.975
	1 vs 2	0.006	-0.016	0.029	0.013	-0.025	0.051	0.033	-0.019	0.086
	1 vs 3	-0.001	-0.032	0.030	0.002	-0.049	0.053	0.027	-0.048	0.102
	2 vs 3	-0.007	-0.037	0.022	-0.011	-0.059	0.037	-0.006	-0.079	0.067
Weighted KM	1 (1-10)	0.963	0.959	0.968	0.945	0.938	0.952	0.935	0.926	0.944
	2 (11-20)	0.964	0.952	0.976	0.920	0.897	0.943	0.889	0.856	0.922
	3 (21+)	0.979	0.973	0.986	0.954	0.942	0.967	0.923	0.906	0.941
	1 vs 2	-0.001	-0.027	0.025	0.024	-0.019	0.067	0.046	-0.013	0.104
	1 vs 3	-0.016	-0.053	0.021	-0.009	-0.069	0.051	0.012	-0.073	0.096
	2 vs 3	-0.016	-0.050	0.019	-0.033	-0.090	0.023	-0.034	-0.118	0.050
Doubly Robust	1 (1-10)	0.974	0.956	0.991	0.963	0.930	0.996	0.952	0.896	1.008
	2 (11-20)	0.972	0.955	0.988	0.936	0.892	0.980	0.908	0.842	0.974
	3 (21+)	0.985	0.972	0.998	0.975	0.941	1.008	0.937	0.839	1.035
	1 vs 2	0.008	-0.069	0.085	0.038	-0.060	0.136	0.060	-0.068	0.188
	1 vs 3	-0.011	-0.090	0.067	-0.010	-0.121	0.100	0.020	-0.160	0.200
	2 vs 3	-0.020	-0.071	0.032	-0.048	-0.141	0.045	-0.040	-0.202	0.122

The table contains, for each estimation method: (i) the estimated survival probabilities at 60, 90, and 110 months for each of the three treatment groups; (ii) the pairwise differences between the estimated survival probabilities across the three treatment groups. All estimated quantities come with bootstrap 95% confidence intervals

ISSN: 1471-2105