Covariate balance-related propensity score weighting in estimating overall hazard ratio with distributed survival data

Table 3 Comparisons of proposed weight, global weight and local weight to estimate the overall hazard ratio in the simulations, with homogenous design and treatment assignment generated with \(X_{1}\)~\(X_{4}\)

			\(\boldsymbol K\boldsymbol=\mathbf{5}\)			\(\boldsymbol K\boldsymbol=\mathbf{10}\)			\(\boldsymbol K\boldsymbol=\mathbf{20}\)
		Global weight	Local weight	Proposed weight	Global weight	Local weight	Proposed weight	Global weight	Local weight	Proposed weight
\({n}_{k}=500\)	Bias	-0.009	-0.011	-0.014	0.003	0.000	-0.001	0.003	0.000	0.002
	RMSE	0.104	0.106	0.098	0.071	0.073	0.065	0.053	0.055	0.048
	r-RMSE	1.063	1.084	1.000 (Ref)	1.087	1.118	1.000 (Ref)	1.106	1.148	1.000 (Ref)
\({n}_{k}=1000\)	Bias	0.003	0.002	0.000	0.003	0.002	0.002	0.002	0.000	0.000
	RMSE	0.071	0.074	0.068	0.053	0.054	0.049	0.035	0.036	0.032
	r-RMSE	1.046	1.091	1.000 (Ref)	1.083	1.104	1.000 (Ref)	1.078	1.109
\({n}_{k}=2000\)	Bias	0.003	0.002	0.002	0.002	0.001	0.001	-0.001	-0.001	-0.001
	RMSE	0.053	0.052	0.050	0.035	0.035	0.032	0.026	0.026	0.024
	r-RMSE	1.064	1.044	1.000 (Ref)	1.087	1.087	1.000 (Ref)	1.069	1.069	1.000 (Ref)

Bias Absolute bias, RMSE Root mean squared error, r-RMSE Ratio of RMSE of global weight or local weight against proposed weight

ISSN: 1471-2288