Table 4.

Type-I error rates with covariate models from balanced design of N _D=1 = 10 and μ _D=0 = 1000

Disp	CovOR	Ncov	Alpha = 0.05		Alpha = 0.01
			NB	FL	NB	FL
0.01	1.2	1	0.071	0.049	0.023	0.01
0.01	1.2	5	0.076	0.05	0.026	0.009
0.01	5	1	0.061	0.041	0.018	0.006
0.01	5	5	0.08	0.021	0.024	0.001
1	1.2	1	0.103	0.041	0.036	0.006
1	1.2	5	0.151	0.045	0.067	0.008
1	5	1	0.102	0.039	0.037	0.007
1	5	5	0.142	0.02	0.061	0.001