Demographic data
| No of residents approached | 399 |
| No of residents consented/assented (%) | 269 (67.4) |
| No of residents excluded | 13 |
| Consent given post cut-off | 6 |
| Died | 4 |
| In hospital | 3 |
| No of residents entered into study | 256 |
| Cambridgeshire | 31 |
| West Yorkshire | 121 |
| London | 104 |
| Women, no (%) | 177 (69.1) |
| Age (y), mean (range) | 85.2 (60–102) |
| Nursing residents, no (%) | 117 (45.7) |
| Residential residents, no (%) | 139 (54.3) |
| Mean no of medicines per resident (95% CI) | 8.0 (7.5 to 8.5) |
| Median no of medicines per resident (range) | 7.5 (1–25) |
| No of residents using monitored dosing systems (%) | 220 (85.9) |
| Cambridgeshire (%) | 23 (74.2) |
| West Yorkshire (%) | 117 (96.7) |
| London (%) | 80 (76.9) |