Relationship between receiving a PIM with demographic variables, number of drugs prescribed and place of residence
| Explanatory variable | OR (95% CI) | |
| Unadjusted | Adjusted* | |
| Age categories, n (%) | ||
| 66–70 | 1.0 | 1.0 |
| 71–80 | 1.16 (1.12 to 1.21) | 0.91 (0.88 to 0.95) |
| 81–90 | 1.18 (1.13 to 1.24) | 0.76 (0.72 to 0.80) |
| 91–99 | 0.98 (0.89 to 1.07) | 0.65 (0.58 to 0.72) |
| Male | 1.0 | 1.0 |
| Female | 1.37 (1.33 to 1.42) | 1.22 (1.17 to 1.26) |
| Polypharmacy (no. of drug classes) | 1.19 (1.18 to 1.19) | 1.19 (1.19 to 1.19) |
| At home | 1.0 | 1.0 |
| In care | 1.32 (1.24 to 1.40) | 0.94 (0.87 to 1.01) |
↵* Mutually adjusted for age, gender, polypharmacy and place of residence.
PIM, potentially inappropriate medicine.