Table 2.
Demographic characteristics – study partners
| Characteristic | Total (N = 617) | MCI (n = 300) | MILD AD (n = 317) | p * |
| Sex, n (%) | 0.021 | |||
| Female | 413 (66.9) | 187 (62.3) | 226 (71.3) | |
| Male | 204 (33.1) | 113 (37.7) | 91 (28.7) | |
| Age at index date (y), mean (SD) | 59.5 (15.4) | 59.7 (15.9) | 59.3 (14.9) | 0.791 |
| Education, n (%) | <0.001 | |||
| Less than high school | 115 (18.7) | 33 (11.0) | 82 (25.9) | |
| High school graduate | 117 (19.0) | 49 (16.4) | 68 (21.5) | |
| Some college | 156 (25.4) | 78 (26.1) | 78 (24.7) | |
| College or above | 225 (36.6) | 138 (46.2) | 87 (27.5) | |
| Study partner relationship, n (%) | 0.117 | |||
| Spouse | 278 (45.1) | 144 (48.0) | 134 (42.3) | |
| Sibling | 37 (6.0) | 14 (4.7) | 23 (7.3) | |
| Child | 161 (26.1) | 70 (23.3) | 91 (28.7) | |
| Friend | 81 (13.1) | 46 (15.3) | 35 (11.0) | |
| Other | 60 (9.7) | 26 (8.7) | 34 (10.7) | |
| Study partner resides with patient, n (%) | 423 (68.6) | 196 (65.3) | 227 (71.6) | 0.100 |
| Number of caregivers in addition to study partner, n (%) | 0.001 | |||
| Zero | 391 (63.4) | 212 (70.7) | 179 (56.5) | |
| One | 166 (26.9) | 67 (22.3) | 99 (31.2) | |
| More than one | 60 (9.7) | 21 (7.0) | 39 (12.3) |
AD, Alzheimer’s disease; MCI, mild cognitive impairment due to AD; MILD AD, mild dementia due to AD; N, number of study partner in the analysis population; n, number of study partner in the specified category; SD, standard deviation. *p-value is from t-test for continuous variables and from Fisher’s exact test for categorical variables between MCI and MILD AD groups based on non-missing observations.