Table 4 Reliability of self-rated health, China Health and Retirement Longitudinal Study 2011
Comparisons | Num. of pairs | Agreement (%) | Polychoric correlation | Kappa | Weighted Kappa |
|---|---|---|---|---|---|
Inter-scale | |||||
Group1-Scale1 vs. Group1-Scale2 | 7898 | 75.7 | 0.83 | 0.62 | - |
Group2-Scale2 vs. Group2-Scale1 | 3531 | 71.6 | 0.81 | 0.55 | - |
Scale 1 vs. Scale 2 | 11,429 | 74.4 | 0.81 | 0.60 | - |
Intra-scale | |||||
Group3-Scale2: begin vs. end | 4533 | 74.8 | 0.82 | 0.60 | - |
Group3-Scale2: begin vs. end (Five-point scale) | 4533 | 68.9 | 0.79 | 0.54 | 0.63 |