Psychometric performance of the Chichewa versions of the EQ-5D-Y-3L and EQ-5D-Y-5L among healthy and sick children and adolescents in Malawi

Journal of Patient-Reported Outcomes

Table 6 Efficiency of the EQ-5D to detect differences in self-reported health status

Measure	Age	Categorisation of self-reported health status	Utility score^#		t-test*		Relative efficiency
Measure	Age	Categorisation of self-reported health status	mean	(SD)	t-statistic	p value	Relative efficiency
EQ-5D-Y-3L	Age 8–12 years (n = 81)	Excellent or v. good	0.838	0.222	2.075	0.041	1.000
EQ-5D-Y-3L		Good or fair	0.746	0.175
EQ-5D-Y 5L		Excellent or v. good	0.812	0.328	0.510	0.612	0.060
EQ-5D-Y 5L		Good or fair	0.780	0.243
EQ-5D-Y-3L		Excellent	0.872	0.200	2.197	0.033	1.000
EQ-5D-Y-3L		v. good, good, fair or poor	0.766	0.205
EQ-5D-Y 5L		Excellent	0.832	0.321	0.660	0.513	0.090
EQ-5D-Y 5L		v. good, good, fair or poor	0.783	0.284
EQ-5D-Y-3L	Age 13–17 years (n = 172)	Excellent or v. good	0.903	0.137	0.148	0.883	1.000
EQ-5D-Y-3L		Good or fair	0.899	0.150
EQ-5D-Y 5L		Excellent or v. good	0.911	0.175	0.123	0.902	0.693
EQ-5D-Y 5L		Good or fair	0.907	0.160
EQ-5D-Y-3L		Excellent	0.933	0.116	2.205	0.029	1.000
EQ-5D-Y-3L		v. good, good, fair or poor	0.887	0.150
EQ-5D-Y 5L		Excellent	0.924	0.210	0.704	0.483	0.102
EQ-5D-Y 5L		v. good, good, fair or poor	0.902	0.147
EQ-5D-Y-3L	Combined ages 7–17 years (n = 253)	Excellent or v. good	0.883	0.169	1.733	0.085	1.000
EQ-5D-Y-3L		Good or fair	0.844	0.175
EQ-5D-Y 5L		Excellent or v. good	0.881	0.235	0.702	0.484	0.164
EQ-5D-Y 5L		Good or fair	0.862	0.202
EQ-5D-Y-3L		Excellent	0.913	0.150	3.027	0.003	1.000
EQ-5D-Y-3L		v. good, good, fair or poor	0.848	0.178
EQ-5D-Y 5L		Excellent	0.895	0.253	0.945	0.346	0.098
EQ-5D-Y 5L		v. good, good, fair or poor	0.864	0.208

Measure	Age	PedsQL 4.0 scale score	Mean	SD	t-statistic	p value	Relative efficiency
EQ-5D-Y-3L	Age 8–12 years (n = 81)	≥ 72.79	0.840	0.159	2.298	0.025	1.000
		< 72.79	0.727	0.249
EQ-5D-Y 5L		≥ 72.79	0.865	0.223	2.237	0.030	0.948
EQ-5D-Y 5L		< 72.79	0.705	0.363
EQ-5D-Y-3L	Age 13–17 years (n = 172)	≥ 78.68	0.946	0.087	3.837	0.000	1.000
		< 78.68	0.864	0.167
EQ-5D-Y 5L		≥ 78.68	0.947	0.151	2.863	0.005	0.557
EQ-5D-Y 5L		< 78.68	0.872	0.177
EQ-5D-Y-3L	Combined ages 7–17 years (n = 253)	≥ 76.81	0.918	0.114	4.716	0.000	1.000
		< 76.81	0.812	0.210
EQ-5D-Y 5L		≥ 76.81	0.929	0.170	4.102	0.000	0.756
EQ-5D-Y 5L		< 76.81	0.808	0.265