Participant and suitable informant baseline characteristics
| Participant characteristic | Intervention (N=132) | Control (N=150) | Total (N=282) |
| Consent: | |||
| Providing own consent | 23 (17.6%) | 38 (25.9%) | 61 (21.9%) |
| Consultee/legal rep consent | 109 (82.4%) | 112 (74.1%) | 221 (78.1%) |
| Age (mean (SD)) | 85.5 (7.4) | 86.4 (7.9) | 86.0 (7.6) |
| Missing | 2 | 3 | 5 |
| Gender: | |||
| Male | 37 (28.0%) | 32 (22.1%) | 69 (24.9%) |
| Female | 95 (72.0%) | 113 (77.9%) | 208 (75.1%) |
| Missing | 0 | 5 | 5 |
| Ethnicity: | |||
| Asian | 1 (0.8%) | 5 (3.4%) | 6 (2.2%) |
| Black | 1 (0.8%) | 0 | 1 (0.4%) |
| White | 106 (80.9%) | 118 (80.8%) | 224 (80.9%) |
| Unable to respond | 23 (17.6%) | 23 (15.8%) | 46 (16.6%) |
| Missing | 1 | 4 | 5 |
| Status: | |||
| Married/partner | 40 (30.5%) | 48 (32.7%) | 88 (31.7%) |
| Divorced | 7 (5.3%) | 8 (5.4%) | 15 (5.4%) |
| Single | 6 (4.6%) | 4 (2.7%) | 10 (3.6%) |
| Widowed | 54 (41.2%) | 60 (40.8%) | 114 (41.0%) |
| Unable to respond | 24 (18.3%) | 27 (18.4%) | 51 (18.3%) |
| Missing | 1 | 3 | 4 |
| Employment status: | |||
| Employed | 3 (2.3%) | 3 (2.1%) | 6 (2.2%) |
| Unemployed | 3 (2.3%) | 3 (2.1%) | 6 (2.2%) |
| Retired | 98 (74.8%) | 107 (73.3%) | 205 (74.0%) |
| Unable to respond | 27 (20.6%) | 33 (22.6%) | 60 (21.7%) |
| Missing | 1 | 4 | 5 |
| Suitable informant characteristic | Intervention (N=132) | Control (N=150) | Total (N=282) |
| Contact: | |||
| Face to face | 121 (91.7%) | 129 (90.8%) | 250 (91.2%) |
| Phone call | 8 (6.1%) | 11 (7.7%) | 19 (6.9%) |
| Postal | 3 (2.3%) | 2 (1.4%) | 5 (1.8%) |
| Missing | 0 | 8 | 8 |
| Relationship: | |||
| Spouse | 26 (19.8%) | 26 (18.3%) | 52 (19.0%) |
| Other family member | 98 (74.8%) | 110 (77.5%) | 208 (76.2%) |
| Non-family member | 4 (3.1%) | 4 (2.8%) | 8 (2.9%) |
| Paid carer | 3 (2.3%) | 2 (1.4%) | 5 (1.8%) |
| Missing | 1 | 8 | 9 |
| Age (mean (SD)) | 60.7 (13.1) | 62.2 (12.6) | 61.5 (12.9) |
| Missing | 4 | 10 | 14 |
| Gender: | |||
| Male | 46 (34.8%) | 63 (44.4%) | 109 (39.8%) |
| Female | 86 (65.2%) | 79 (55.6%) | 165 (60.2%) |
| Missing | 0 | 8 | 8 |
| Ethnicity: | |||
| Asian | 1 (0.8%) | 7 (4.9%) | 8 (2.9%) |
| Black | 2 (1.5%) | 0 | 2 (0.7%) |
| White | 129 (97.7%) | 135 (95.1%) | 264 (96.4%) |
| Missing | 0 | 8 | 8 |
| Status: | |||
| Married/partner | 98 (77.2%) | 109 (77.3%) | 207 (77.2%) |
| Divorced | 11 (8.7%) | 8 (5.7%) | 19 (7.1%) |
| Single | 15 (11.8%) | 16 (11.3%) | 31 (11.6%) |
| Widowed | 3 (2.4%) | 8 (5.7%) | 11 (4.1%) |
| Missing | 5 | 9 | 14 |
| Employment status: | |||
| Employed | 63 (48.1%) | 54 (38.0%) | 117 (42.9%) |
| Unemployed | 11 (8.4%) | 21 (14.8%) | 32 (11.7%) |
| Retired | 57 (43.5%) | 67 (47.2%) | 124 (45.4%) |
| Missing | 1 | 8 | 9 |