Table 3 Floor and ceiling effects for the CHU9D among school children in grades 1–9 and stratified by school stages
|  | All (n = 473) | School stages | ||||||
|---|---|---|---|---|---|---|---|---|
Grades 1–3 (n = 168) | Grades 4–6 (n = 146) | Grades 7–9 (n = 159) | ||||||
Dimensions | Floor1 (%) | Ceiling2 (%) | Floor1 (%) | Ceiling2 (%) | Floor1 (%) | Ceiling2 (%) | Floor1 (%) | Ceiling2 (%) |
Total score | 0 | 8.5 | 0 | 11.9 | 0 | 8.2 | 0 | 5.0 |
 Worried | 0.8 | 73.4 | 0 | 83.3 | 1.4 | 77.4 | 1.3 | 59.1 |
 Sad | 1.3 | 76.5 | 0 | 84.5 | 2.0 | 75.3 | 1.9 | 69.2 |
 Pain | 1.7 | 58.8 | 1.2 | 64.9 | 3.4 | 53.4 | 0.6 | 57.2 |
 Tired | 9.3 | 21.1 | 7.1 | 28.0 | 4.8 | 23.3 | 15.7 | 11.9 |
 Annoyed | 0.6 | 67.6 | 0 | 80.9 | 0.7 | 69.9 | 1.3 | 51.6 |
 Schoolwork | 0.2 | 58.3 | 0.6 | 74.4 | 0 | 67.8 | 0 | 32.7 |
 Sleep | 1.7 | 55.8 | 2.4 | 59.5 | 1.4 | 58.9 | 1.3 | 49.1 |
 Daily routine | 0.4 | 73.4 | 1.2 | 76.8 | 0 | 71.9 | 0 | 71.1 |
 Activities | 1.3 | 62.6 | 1.2 | 67.9 | 2.0 | 67.8 | 0.6 | 52.2 |