Table 2.
Distribution of a Sample of 3,423 Informants in the National Alzheimer’s Coordinating Center’s Uniform Data Set
| Variables | Mean | SD |
|---|---|---|
| Birth year (Range: 1906–1994) | 1947 | 13.55 |
| Education (Range: 1–26 years) | 14.55 | 2.88 |
| Number of years known to participant (Range: 1–66 years) | 33 | 16.79 |
| Variables | Sample sizes | % |
| Sex | ||
| Male | N = 480 | 14.76 |
| Female | N = 2,773 | 85.24 |
| Relationship to participant | ||
| Spouse | N = 1,994 | 61.30 |
| Child | N = 553 | 16.38 |
| Sibling | N = 181 | 5.56 |
| Other relative | N = 163 | 5.01 |
| Friend, neighbor | N = 252 | 7.75 |
| Paid caregiver | N = 33 | 1.01 |
| Other | N = 97 | 2.98 |
| Lives with participant | ||
| Yes | N = 2,187 | 67.23 |
| No | N = 1,066 | 32.77 |
| Frequency of visitsa | ||
| Daily | N = 177 | 5.44 |
| At least three times per week | N = 289 | 8.88 |
| Weekly | N = 270 | 8.30 |
| At least three times per month | N = 120 | 3.69 |
| Monthly | N = 111 | 3.41 |
| Less than once per month | N = 99 | 3.04 |
| Frequency of telephone contacta | ||
| Daily | N = 392 | 12.05 |
| At least three times per week | N = 293 | 9.01 |
| Weekly | N = 186 | 5.72 |
| At least three times per month | N = 60 | 1.84 |
| Monthly | N = 52 | 1.60 |
| Less than once per month | N = 83 | 2.55 |
| Question of reliability of informant | ||
| Yes | N = 150 | 4.61 |
| No | N = 3,103 | 95.39 |
aOf those not living together.