Convergent validity between ICECAP-O and SF-6D measures (n=114)† using Pearson’s correlation coefficient
ICECAP-O overall | ICECAP-O domain attachment | Security | Role | Enjoyment | Control | |
SF-6D overall | 0.65** | – | – | – | – | – |
SF-6D domain | ||||||
Physical health | 0.43** | 0.08 | 0.31* | 0.40** | 0.32* | 0.40** |
Role limitations | 0.30* | 0.05 | 0.21* | 0.28* | 0.14 | 0.31* |
Social functioning | 0.41** | 0.18 | 0.25* | 0.34* | 0.30* | 0.35* |
Pain | 0.56** | 0.17 | 0.29* | 0.51** | 0.43** | 0.53** |
Mental health | 0.39** | 0.19* | 0.35* | 0.30* | 0.27* | 0.27* |
Vitality | 0.44** | 0.17 | 0.21* | 0.41** | 0.28* | 0.42** |
*P<0.05; **P<0.001.
†Observations with missing values on either SF-12 or ICECAP-O questions were removed from the analysis (n=15).
ICECAP-O, Investigating Choice Experiments Capability Measure-Older people; SF-6D, Short-Form six dimensions; SF-12, Short-Form 12 dimensions.