Descriptive table of the study population
| Variables | Category | Control (%) | Case (%) | Total (%) | P value |
| Total | 2860 | 2860 | 5720 | ||
| Age | 75–<80 | 738 (27.38) | 738 (27.38) | 1476 (25.80) | |
| 80–<85 | 831 (29.06) | 831 (29.06) | 1662 (29.06) | ||
| 85–<90 | 711 (24.86) | 711 (24.86) | 1422 (24.86) | ||
| ≥90 | 580 (20.28) | 580 (20.28) | 1160 (20.28) | ||
| Gender | Male | 1657 (57.94) | 1657 (57.94) | 3314 (57.94) | |
| Female | 1203 (42.06) | 1203 (42.06) | 2406 (42.06) | ||
| Use of PIM | No use of PIM | 2618 (91.54) | 2503 (87.52) | 5121 (89.53) | |
| Use of PIM | 242 (8.46) | 357 (12.48) | 599 (10.47) | 0.001 | |
| Chronic conditions, n | 0 | 324 (11.33) | 195 (6.82) | 519 (9.07) | |
| 1 | 408 (14.27) | 278 (9.72) | 686 (11.99) | ||
| 2–4 | 1285 (44.93) | 986 (34.48) | 2271 (39.70) | ||
| 5–7 | 619 (21.64) | 865 (30.24) | 1484 (25.94) | ||
| ≥8 | 224 (7.83) | 536 (18.74) | 760 (13.29) | 0.001 | |
| Medicines, n | 0 | 422 (14.76) | 290 (10.14) | 712 (12.45) | |
| 1–4 | 1348 (47.13) | 917 (32.06) | 2265 (39.60) | ||
| 5–9 | 896 (31.33) | 1157 (40.45) | 2053 (35.89) | ||
| 10–14 | 172 (6.01) | 390 (13.64) | 562 (9.83) | ||
| ≥15 | 22 (0.77) | 106 (3.71) | 128 (2.24) | 0.001 |
PIM, potential inappropriate medicine.