Table 4.
Distribution of HRS survey scores* from Self and Proxy respondents stratified by scores from the claims-based coding algorithm
| Self-respondents |
Proxy respondents |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claims- based score | N | (%) | HRS Mean score | Std. Dev | Gamma | Probability of Concordance | N | (%) | HRS Mean score | Std. Dev | Gamma | Probability of Concordance |
| (95% CI) | (95% CI) | |||||||||||
| Age 75 | ||||||||||||
| 0–1 | 3,954 | (97.94%) | 21.87 | 4.94 | −0.68 (−0.77, −0.58) |
83.80% | 178 | (70.08%) | 3.44 | 2.54 | 0.78 (0.70, 0.87) |
89.24 % |
| ≥2 | 83 | (2.06%) | 13.93 | 6.66 | 76 | (29.92%) | 7.32 | 2.07 | ||||
| Total | 4,037 | (100.00%) | 21.72 | 5.10 | 254 | (100.00%) | 4.60 | 2.99 | ||||
| Age 80 | ||||||||||||
| 0–1 | 3,007 | (96.07%) | 20.79 | 4.89 | −0.62 (−0.70, −0.54) |
81.06% | 169 | (56.15%) | 4.18 | 2.84 | 0.67 (0.57, 0.77) |
83.43% |
| ≥2 | 123 | (3.93%) | 14.10 | 6.16 | 132 | (43.85%) | 7.53 | 2.20 | ||||
| Total | 3,130 | (100.00%) | 20.53 | 5.12 | 301 | (100.00%) | 5.65 | 3.06 | ||||
| Age 85 | ||||||||||||
| 0–1 | 2,009 | (89.35%) | 19.52 | 5.08 | −0.62 (−0.69, −0.55) |
81.04% | 146 | (44.23%) | 4.36 | 2.59 | 0.65 (0.55, 0.75) |
82.63% |
| ≥2 | 168 | (10.65%) | 13.10 | 5.83 | 166 | (55.77%) | 7.34 | 2.44 | ||||
| Total | 2,177 | (100.00%) | 19.02 | 5.41 | 312 | (100.00%) | 5.95 | 2.83 | ||||
*
Self-respondents were scored on a scale of 0–35 where lower scores indicate poor cognition, and proxy respondents were scored on a scale of 0–11 where higher scores indicate poor cognition; Probability shown is the Probability of Concordance
Table 4 shows the mean HRS survey scores from self and proxy respondents for patients who scored ≤1 and ≥2 on the claims-based algorithm. The gammas (γ) are displayed to show the degree of agreement between both scores. The last column shows the probability of concordance estimated by (1+| γ|)/2.