Medication count helps flag fall-hospitalization risk
Simple polypharmacy thresholds predicted fall-related hospitalization about as well as more complex medication lists in older adults.
*Retrospective population cohort study; Level 1b (OCEBM).
Citation
Gagnon ME, Talbot D, Simard M, Boiteau V, Sirois C. Polypharmacy as a simple measure for assessing the risk of fall-related hospitalization in older adults. American Journal of Preventive Medicine. 2026;70(4):108206.
Background
Medicines are a modifiable risk factor for falls, but it is unclear whether simple medication counts predict serious falls as well as more detailed “high-risk medication” lists. This study compared several medication-based measures for predicting first fall-related hospitalization.
Patients
Community-dwelling adults older than 66 years in Quebec, covered by the public drug plan, with no fall-related hospitalization in the prior year. Excluded: >45 hospital days during a prespecified baseline window.
Intervention
Medication-based risk measures from the prior year (including: 5 or more medicines; 10 or more medicines; 5 or more medicine classes; at least 1 fall-risk–increasing medicine; at least 1 potentially inappropriate medicine).
Control
Not meeting each medication-based threshold (plus a base model using age, residence, and neighborhood-level social and material deprivation).
Outcome
Hospitalization due to a fall (first event).
Follow-up Period
1 year.
Results
Fall-related hospitalization occurred in 1.8% of women (11,773/647,795) and 1.1% of men (5,650/529,725).
| Best-performing measure |
Women: hazard ratio (95% confidence interval) |
Men: hazard ratio (95% confidence interval) |
Prediction score (c-statistic) |
| 10 or more medicines |
1.90 (1.82 to 1.98) |
2.17 (2.05 to 2.31) |
0.733 (women); 0.735 (men) |
| At least 1 fall-risk–increasing medicine |
— |
— |
0.735 (women); 0.736 (men) |
c-statistic ranges from 0.5 (chance) to 1.0 (perfect separation of higher vs lower risk).
Limitations
Only hospitalizations were captured, so most falls were missed. Pharmacy claims may not reflect actual use and do not include over-the-counter drugs. Small differences in prediction scores may not be meaningful for individual care, and results may not generalize to people with long hospital stays.
Funding
Provincial training grants and Quebec health research career awards.
Clinical Application
For initial fall-risk screening, counting medicines (especially 10 or more) is a practical flag; consider medication review and deprescribing discussions when feasible.