Table 3.
Empirically Observed Prevalence of Proxy IQCODE Impairment over Time
| Visit month | Full Sample
|
Peak CAM-S score | ||||||
|---|---|---|---|---|---|---|---|---|
| 0 – 2
|
3 – 7
|
8 – 19
|
||||||
| N | n (%) | N | n (%) | N | n (%) | N | n (%) | |
| 0 | 548 | 118 (22) | 238 | 40 (17) | 242 | 59 (24) | 68 | 19 (28) |
| 6 | 514 | 135 (26) | 229 | 46 (20) | 226 | 67 (30) | 59 | 22 (37) |
| 12 | 487 | 130 (27) | 217 | 49 (23) | 218 | 60 (28) | 52 | 21 (40) |
| 18 | 480 | 142 (30) | 208 | 49 (24) | 217 | 66 (30) | 55 | 27 (49) |
| 24 | 452 | 125 (28) | 202 | 46 (23) | 205 | 61 (30) | 45 | 18 (40) |
| 30 | 314 | 101 (32) | 127 | 28 (22) | 145 | 54 (37) | 42 | 19 (45) |
| 36 | 287 | 94 (33) | 118 | 25 (21) | 126 | 48 (38) | 43 | 21 (49) |
CAM-S = Confusion Assessment Method-Severity
IQCODE = Informant Questionnaire on Cognitive Decline in the Elderly
Since the IQCODE is proxy-rated, the sample sizes in this table reflect the availability of proxy-informants over time; 12 patients did not have any proxies available at baseline, yielding a total proxy sample of N=548
N=total possible sample, n=number with proxy IQCODE impairment