Table 2. Internal consistency and floor/ceiling effects.
| K-FAQLQ-PF | Age group (year) | No. | Item | Mean ± SD | Cronbach’s α | Floor (%) | Ceiling (%) |
|---|---|---|---|---|---|---|---|
| Total score | 0–3 | 48 | 14 | 2.70 ± 1.39 | 0.95 | 0 | 0 |
| 4–6 | 70 | 26 | 3.18 ± 1.19 | 0.96 | 0 | 0 | |
| 7–12 | 62 | 30 | 2.96 ± 1.41 | 0.97 | 0 | 0 | |
| Emotional impact | 0–3 | 48 | 6 | 2.31 ± 1.49 | 0.91 | 2.1 | 0 |
| 4–6 | 70 | 10 | 2.74 ± 1.20 | 0.91 | 0 | 0 | |
| 7–12 | 62 | 13 | 2.59 ± 1.36 | 0.94 | 0 | 0 | |
| Food anxiety | 0–3 | 48 | 3 | 2.58 ± 1.59 | 0.85 | 4.2 | 4.2 |
| 4–6 | 70 | 7 | 3.20 ± 1.26 | 0.90 | 0 | 0 | |
| 7–12 | 62 | 8 | 3.31 ± 1.49 | 0.92 | 1.6 | 0 | |
| Social and dietary limitations | 0–3 | 48 | 5 | 3.22 ± 1.54 | 0.89 | 0 | 0 |
| 4–6 | 70 | 9 | 3.59 ± 1.37 | 0.90 | 0 | 0 | |
| 7–12 | 62 | 9 | 2.96 ± 1.59 | 0.94 | 0 | 0 |
K-FAQLQ-PF, Korean version of the Food Allergy Quality of Life Questionnaire Parent Form; SD, standard deviation.