Table 4 Descriptive statistics for FROM-16-scores and GHS-scores baseline (t1) and retest (t2) and measures of reliability and criterion validity
t1 FROM-16 Total Score | t1 caregivers General Health Score (GHS) | t2 FROM-16 Total Score | t2 caregivers General Health Score (GHS) | |
|---|---|---|---|---|
Valid answers | 74 | 90 | 67 | 83 |
Mean (SD) | 16.8 (6.6) | 6.1 (1.9) | 16.1 (7.2) | 6.1 (2.0) |
Median (interquartile range) | 17 (12–21.3) | 6 (5–8) | 16 (11–21) | 6 (5–8) |
Min–Max | 0–31 | 2–10 | 0–31 | 0–10 |
Floor | 1 | – | 2 | 1 |
Ceiling | – | 2 | – | 2 |
Internal consistency: | ||||
Cronbach’s α | α = 0.859 | α = 0.894 | ||
Reproducibility (t1 and t2): | ||||
ICC (95%CI) | 0.87 (0.79–0.92) | |||
Criterion validity: | ||||
Correlation of Total score with… | r = − 0.35 p = 0.002 | r = − 0.48 p < 0.001 | ||
Correlation of Emotional score with… | r = − 0.32 p = 0.003 | r = − 0.39 p = 0.001 | ||
Correlation of Personal and Social Life score with… | r = − 0.33 p = 0.003 | r = − 0.48 p < 0.001 |