TABLE 3.
Dementia Classification | Risk Adjustment Differentials Compared with No Dementia by Year Before Death | ||||||||
---|---|---|---|---|---|---|---|---|---|
8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
Risk adjustment factor | |||||||||
Alzheimer disease | 1.11b | 1.19c | 1.26b | 1.35b | 1.45b | 1.58b | 1.72 | 1.91b | 2.15b |
General dementia | 1.20b | 1.29b | 1.37b | 1.47b | 1.58b | 1.70b | 1.86b | 2.08b | 2.42b |
No dementia | 1.13 | 1.20 | 1.28 | 1.37 | 1.47 | 1.59 | 1.73 | 1.93 | 2.26 |
Risk adjustment differential compared with no dementia | |||||||||
Alzheimer disease | (0.03)b | (0.01)b | (0.01)b | (0.02)b | (0.02)b | (0.02)b | (0) | (0.02)b | (0.11)b |
General dementia | 0.07b | 0.09b | 0.09b | 0.09b | 0.11b | 0.11b | 0.13b | 0.16b | 0.17b |
Source: Authors’ analysis of the 2006-2015 Medicare 5 Percent Limited Data Set claims files.27
aDifferential calculated as Alzheimer disease/general dementia risk score minus no dementia risk score. For example, the Alzheimer average risk score in Year 0 (= 2.15) is 0.11 less than the no dementia risk score in Year 0 (= 2.26).
bP < 0.01.
cP < 0.1.