When researchers study what separates a good nursing home from a dangerous one, one factor consistently rises to the top: how many nurses and aides are available per resident, and whether those staff members show up consistently.
Federal inspection data, academic studies, and CMS star ratings all point to the same conclusion ??? understaffed facilities have more preventable harm events, more hospitalizations, and worse resident outcomes across nearly every measure.
What CMS Measures ??? and What It Misses
CMS publishes staffing data for every Medicare- and Medicaid-certified nursing home through its Care Compare database. The key metrics are:
- RN hours per resident day ??? Registered nurse time is strongly associated with lower rates of pressure injuries, falls with injury, and hospitalizations.
- Total nurse staffing hours per resident day ??? Includes RNs, LPNs, and CNAs combined.
- Weekend staffing ??? Often significantly lower than weekday levels. CMS now reports this separately because weekend gaps drive a disproportionate share of adverse events.
The limitation: these are self-reported figures. Since 2016, CMS has cross-checked them against payroll records through the Payroll-Based Journal (PBJ) system, which has improved accuracy ??? but data can still lag real-world conditions by several months.
What “Below Average” Staffing Actually Looks Like
The national average for total nursing hours is roughly 3.8 hours per resident per day. Facilities at or above this level typically provide better continuity of care. Facilities significantly below it ??? particularly those with less than 3.0 total nurse hours ??? show measurably higher rates of:
- Pressure ulcers (Stage 2 and higher)
- Urinary tract infections
- Unplanned hospitalizations
- Resident falls resulting in injury
- Use of antipsychotic medications as a chemical restraint substitute
On Senior Care Report Card, a staffing sub-score below 50/100 reflects a meaningful concern. A score below 30 indicates staffing levels that are well below both state and national averages ??? a serious warning flag.
The Weekend Gap Problem
Multiple studies have found that adverse events spike on weekends and holidays ??? not because residents are suddenly sicker, but because facilities routinely reduce staffing on those days. A 2023 CMS analysis found that the median facility had 14% fewer nursing hours per resident on weekends compared to weekdays.
Before placing a loved one, it is worth asking: What is your staffing ratio on weekends? Are agency (temporary) staff used on weekends, and what is the continuity policy?
Agency Staff vs. Permanent Staff
Facilities facing chronic staffing shortages often fill gaps with agency (temporary contract) nurses and aides. There is nothing inherently wrong with agency staff, but high reliance on agency staffing correlates with worse care continuity. Residents ??? especially those with dementia ??? rely heavily on familiar faces and consistent routines. Frequent staff turnover disrupts that continuity and increases the chance of errors.
CMS does not publish agency-use percentages in Care Compare, but you can ask the facility directly: What percentage of your nursing staff is permanent vs. agency?
Five Questions to Ask Any Facility About Staffing
- What is your current RN hours per resident day? (Compare to the national average of ~0.7 RN hours.)
- Do you have an RN on-site 24 hours a day, or only on call? Federal law requires an RN on duty for at least 8 consecutive hours daily ??? but the best facilities maintain 24-hour RN coverage.
- What is your CNA-to-resident ratio on the evening and night shifts? Day shift ratios are often misleading ??? nights and evenings are when understaffing causes the most harm.
- What is your staff turnover rate? Annual CNA turnover above 50% is a red flag. Above 75% is a serious concern.
- Can I speak with the Director of Nursing before admission? A facility confident in its staffing will welcome this conversation.
How We Score Staffing
Staffing accounts for 25% of the Senior Care Report Card score ??? the largest single pillar. We score each facility relative to the state average for total nurse hours and RN hours, with additional weight for facilities with documented weekend staffing gaps.
A score of 70 or above indicates staffing at or above state averages. Below 50 is a meaningful concern. Below 30 warrants serious caution and direct conversation with facility management before any placement decision.
Data source: CMS Care Compare, Payroll-Based Journal staffing reports. Updated monthly.