Table 3.

Frequencies of reported problems and missing values for EQ-5D-Y and EQ-5D-Y plus bolt-on

EQ-5D-Y dimensions	Questionnaire version
	EQ-5D-Y		EQ-5D-Y Bolt-On
	(n = 223)		(n = 223)
	n	%	n	%
Mobility					p = 0.6120
No problems	197	88.3	200	89.7
Some problems	22	9.9	22	9.9
A lot of problems	3	1.3	0	0.0
Missing	1	0.4	1	0.4
Looking after myself					p = 0.6255
No problems	214	96.0	213	95.5
Some problems	6	2.7	9	4.0
A lot of problems	1	0.4	0	0.0
Missing	2	0.9	1	0.4
Doing usual activities					p = 0.5710
No problems	192	86.1	187	83.9
Some problems	26	11.7	29	13.0
A lot of problems	4	1.8	5	2.2
Missing	1	0.4	2	0.9
Having pain or discomfort					p = 0.7419
No problems	150	67.3	149	66.8
Some problems	62	27.8	65	29.1
A lot of problems	6	2.7	7	3.1
Missing	5	2.2	2	0.9
Feeling worried, sad or unhappy					p = 0.2600
Not	160	71.7	173	77.6
A bit	57	25.6	35	15.7
Very	4	1.8	13	5.8
Missing	2	0.9	2	0.9
Cognitive abilities
No problems	Not included		184	82.5	–
Some problems			32	14.3
A lot of problems			4	1.8
Missing			3	1.3
Concentration
No problems	Not included		151	67.7	–
Some problems			62	27.8
A lot of problems			7	3.1
Missing			3	1.3
Memory
No problems	Not included		170	76.2	–
Some problems			43	19.3
A lot of problems			5	2.2
Missing			5	2.2
School performance
No problems	Not included		169	75.8	–
Some problems			47	21.1
A lot of problems			4	1.8
Missing			3	1.3
EQ-VAS					p = 0.7507
Mean	82.4		82.69
Standard deviation	18.69		18.02
Missing	3	1.3	2	0.9