Influence of treatment received on outcomes for participants with complete data at 12 months
| Number of RYCT sessions | Number of RYCT sessions attended by CS* | Number of CSP sessions | ||||
|---|---|---|---|---|---|---|
| Coefficient† | 95% CI | Coefficient† | 95% CI | Coefficient† | 95% CI | |
| Carer outcomes | ||||||
| SF12 MCS | −0.0365 | (−0.180 to 0.107) | 0.152 | (−0.163 to 0.466) | 0.0823 | (−0.0365 to 0.201) |
| SF12 PCS | −0.115 | (−0.262 to 0.0315) | 0.220 | (−0.0992 to 0.540) | 0.0900 | (−0.0311 to 0.211) |
| EQ-5D self-reported utility | −0.00376 | (−0.00838 to 0.000850) | 0.00660 | (−0.00325 to 0.0165) | 0.000135 | (−0.00363 to 0.00390) |
| EQ-5D self-rated general health | −0.0606 | (−0.418 to 0.296) | 0.453 | (−0.307 to 1.214) | 0.0961 | (−0.193 to 0.385) |
| HADS anxiety | −0.00616 | (−0.0821 to 0.0698) | −0.107 | (−0.270 to 0.0553) | 0.00404 | (−0.0581 to 0.0661) |
| HADS depression | 0.00937 | (−0.0602 to 0.0789) | −0.145 | (−0.294 to 0.00518) | −0.0253 | (−0.0827 to 0.0321) |
| HADS total | 0.00790 | (−0.125 to 0.141) | −0.252 | (−0.538 to 0.0341) | −0.0256 | (−0.135 to 0.0839) |
| PANAS positive affectivity | 0.0200 | (−0.0957 to 0.136) | 0.157 | (−0.0915 to 0.405) | −0.150 | (−0.110 to −0.0795) |
| COPE PAC | 0.0103 | (−0.0308 to 0.0514) | 0.0407 | (−0.0470 to 0.128) | 0.0398 | (0.00580 to 0.0737) |
| Carer distress NPI-D | 0.0351 | (−0.142 to 0.212) | −0.0494 | (−0.422 to 0.324) | 0.0732 | (−0.0755 to 0.222) |
| Personal growth | −0.000814 | (−0.0476 to 0.0460) | −0.00282 | (−0.105 to 0.100) | 0.00681 | (−0.0316 to 0.0452) |
| QCPR warmth | −0.0222 | (−0.116 to 0.0719) | 0.0223 | (−0.179 to 0.223) | 0.0522 | (−0.0260 to 0.131) |
| QCPR absences of criticism and conflict | −0.0116 | (−0.0946 to 0.0715) | −0.0229 | (−0.202 to 0.156) | −0.0368 | (−0.106 to 0.0324) |
| QCPR Total | −0.0329 | (−0.184 to 0.118) | −0.0142 | (−0.338 to 0.309) | 0.0183 | (−0.108 to 0.144) |
| Loneliness | −0.00569 | (−0.0450 to 0.0336) | 0.0148 | (−0.0692 to 0.0989) | 0.00345 | (−0.0286 to 0.0356) |
| Person with dementia outcomes | ||||||
| QoL-AD self-reported | 0.0730 | (−0.0632 to 0.209) | −0.0483 | (−0.381 to 0.284) | −0.0295 | (−0.135 to 0.0755) |
| QoL-AD proxy reported | 0.0351 | (−0.0650 to 0.135) | −0.0531 | (−0.273 to 0.167) | −0.0933 | (−0.175 to −0.0115) |
| DEMQOL self-reported | 0.0891 | (−0.186 to 0.364) | 0.232 | (−0.523 to 0.986) | −0.0891 | (−0.299 to 0.121) |
| DEMQOL proxy reported | −0.0879 | (−0.322 to 0.146) | −0.00380 | (−0.497 to 0.489) | −0.0272 | (−0.220 to 0.166) |
| HADS anxiety | 0.0218 | (−0.0649 to 0.108) | −0.0528 | (−0.289 to 0.184) | 0.0126 | (−0.0537 to 0.0790) |
| HADS depression | −0.0331 | (−0.121 to 0.0552) | −0.0101 | (−0.253 to 0.233) | 0.0103 | (−0.0576 to 0.0783) |
| HADS total | −0.0182 | (−0.166 to 0.129) | −0.0591 | (−0.461 to 0.343) | 0.0175 | (−0.0959 to 0.131) |
| ADCS-ADL | 0.185 | (−0.103 to 0.473) | −0.261 | (−0.894 to 0.373) | −0.213 | (−0.442 to 0.0162) |
| QCPR warmth | 0.0643 | (−0.0366 to 0.165) | −0.118 | (−0.400 to 0.163) | 0.0163 | (−0.0618 to 0.0944) |
| QCPR absence of criticism and conflict | 0.158 | (0.0514 to 0.265) | −0.204 | (−0.495 to 0.0833) | 0.0147 | (−0.0690 to 0.0985) |
| QCPR total | −0.0166 | (−0.154 to 0.121) | 0.161 | (−0.126 to 0.447) | −0.101 | (−0.210 to 0.00847) |
*Combined intervention.
†Coefficients represent the mean change in outcome with change in number of sessions attended when all other variables in the model are constant; negative coefficients show that outcomes deteriorate as attendance increases.
ADCS-ADL, Alzheimer's Disease Cooperative Study—Activities of Daily Living; COPE, Carers of Older People in Europe; NPI-D, Neuropsychiatric Inventory Carer Distress Scale; CS, carer supporter; DEMQOL, quality of life for people with dementia; EQ-5D, EuroQol 5 dimensions; HADS, Hospital Anxiety and Depression Scale; MCS, mental component score; PAC, Positive Aspects of Caring; PANAS, Positive and Negative Affect Schedule; PCS, physical component score; QCPR, Quality of Caregiver–Patient Relationship; QoL-AD, Quality of Life in Alzheimer's Disease Scale; SF, short form.