Table 7.

Respondents’ preferences for attributes of blood donation services.

Variable	Coeff.	Std. Err.	$P>\mid Z\mid$
Transport cost	−0.0008	0.0003	0.003
SD	0.0022	0.0003	0.000
At most 1 h	0.3699	0.1165	0.001
SD	0.8424	0.1268	0.000
At most 2 h	0.1230	0.0933	0.187
SD	−0.0118	0.1779	0.947
Meal voucher	−0.4710	0.1816	0.009
SD	1.6258	0.1756	0.000
Free medical check-up	1.0166	0.1980	0.000
SD	2.3109	0.2247	0.000
Donor only	−0.4467	0.0931	0.000
SD	−0.0946	0.2630	0.719
Anybody in need	−0.2590	0.1011	0.010
SD	0.6268	0.1329	0.000

Number of respondents = 150; Coeff.: coefficient; Std. Err.: standard error; C. I.: confidence interval; log likelihood = −1140.472; likelihood ratio ${\chi }^2\left(7\right)=533.46$ ; probability $>{\chi }^2$  = 0.000.