| Cognitive status | ||
| Study | Outcomes | Notes |
| Hughes 1992 |
At 6 months (mean) Intervention group: 8.33, 18 participants, control group: 8.86, 14 participants |
High attrition in both groups due to death. Used Short Portable Mental Status Questionnaire (10 items). No P value given, insufficient data to calculate CI. |
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