Table 4.

Results for the colon cancer data analysis

Method	Parameter	Est	SE	–value	LB	UB
Case 1A IV (R)	Oxaliplatin	0.368	0.142	0.010	0.089	0.647
	Age	–0.140	0.102	0.171	–0.340	0.060
	Age	–0.270	0.115	0.018	–0.495	–0.045
	Age	–0.650	0.108	0.000	–0.863	–0.438
	Income	0.151	0.072	0.035	0.011	0.292
	Diabetes	–0.210	0.087	0.015	–0.379	–0.040
Case 1A IV (BJ)	Oxaliplatin	0.392	0.147	0.008	0.105	0.679
	Age	–0.122	0.106	0.250	–0.329	0.086
	Age	–0.310	0.121	0.010	–0.547	–0.073
	Age	–0.656	0.117	0.000	–0.886	–0.426
	Income	0.152	0.076	0.045	0.003	0.300
	Diabetes	–0.245	0.093	0.009	–0.427	–0.062
Case 2B IV	Oxaliplatin	0.398	0.144	0.006	0.116	0.681
	Age	–0.115	0.102	0.258	–0.314	0.084
	Age	–0.312	0.121	0.010	–0.549	–0.075
	Age	–0.637	0.117	0.000	–0.866	–0.408
	Income	0.158	0.075	0.034	0.012	0.304
	Diabetes	–0.244	0.093	0.009	–0.425	–0.062
Naïve	Oxaliplatin	0.149	0.079	0.059	–0.006	0.304
	Age	–0.162	0.102	0.112	–0.362	0.038
	Age	–0.294	0.114	0.010	–0.517	–0.071
	Age	–0.709	0.104	0.000	–0.913	–0.505
	Income	0.167	0.070	0.017	0.030	0.304
	Diabetes	–0.220	0.085	0.010	–0.387	–0.053

Case 1A IV (R), Case 1A instrumental variable method with estimated by the rank method; Case 1A IV (BJ), Case 1A instrumental variable method with estimated by the Buckley–James method; Est, estimated coefficient; SE, standard error; LB, lower bound of the 95% Wald confidence interval; UB, upper bound of the 95% Wald confidence interval.