Table 2.
Characteristics of the included studies
| N | % | |
|---|---|---|
| Explicit aim to assess psychometric performance | ||
| Yes: Direct assessment study | 163 | 43.8 |
| No: Indirect assessment study | 209 | 56.2 |
| Total | 372 | 100.0 |
| Instrument(s) assessed | ||
| 16D | 10 | 2.7 |
| 17D | 6 | 1.6 |
| AHUM | 1 | 0.3 |
| AQoL-6D | 4 | 1.1 |
| CH-6D | 1 | 0.3 |
| CHSCS-PS | 3 | 0.8 |
| CHU9D | 43 | 11.6 |
| EQ-5D-Y-3L | 68 | 18.3 |
| EQ-5D-Y-5L | 6 | 1.6 |
| HUI2 | 38 | 10.2 |
| HUI3 | 78 | 21.0 |
| IQI | 1 | 0.3 |
| QWB | 14 | 3.8 |
| TANDI | 3 | 0.8 |
| 16D; 17D | 10 | 2.7 |
| AQoL-6D; CHU9D | 2 | 0.5 |
| CHU9D; EQ-5D-Y-3L | 9 | 2.4 |
| CHU9D; HUI2 | 1 | 0.3 |
| CHU9D; HUI2; HUI3 | 3 | 0.8 |
| CHU9D; HUI3 | 1 | 0.3 |
| EQ-5D-Y-3L; EQ-5D-Y-5L | 5 | 1.3 |
| EQ-5D-Y-3L; HUI2; HUI3 | 2 | 0.5 |
| HUI2; HUI3 | 59 | 15.9 |
| HUI2; HUI3; QWB | 2 | 0.5 |
| HUI3; QWB | 2 | 0.5 |
| Total | 372 | 100.0 |
| Childhood population type | ||
| General/healthy | 74 | 19.9 |
| Clinical | 210 | 56.5 |
| General/healthy and clinical | 88 | 23.7 |
| Total | 372 | 100.0 |
| Target childhood age group | ||
| (1) Infants and preschool children aged < 5 years | 14 | 3.8 |
| (2) Pre-adolescents aged 5–11 years | 66 | 17.7 |
| (3) Adolescents aged 12–18 years | 85 | 22.8 |
| (1) and (2) | 11 | 3.0 |
| (2) and (3) | 145 | 39.0 |
| (1), (2), and (3) | 45 | 12.1 |
| Unclear | 6 | 1.6 |
| Total | 372 | 100.0 |
16D 16-Dimensional Health-Related Measure, 17D 17-Dimensional Health-Related Measure, AHUM Adolescent Health Utility Measure, AQoL-6D Assessment of Quality of Life, 6-Dimensional, Adolescent, CH-6D Child Health—6 Dimensions, CHSCS-PS Comprehensive Health Status Classification System—Preschool, CHU9D Child Health Utility—9 Dimensions, EQ-5D-Y-3L/5L EuroQoL 5-Dimensional questionnaire for Youth 3/5 Levels, HUI2/3 Health Utilities Index 2/3, IQI Infant health-related Quality of life Instrument, QWB Quality of Well-Being scale, TANDI Toddler and Infant Health-Related Quality of Life Instrument