Staffing Ratios Matter More Than Star Ratings — Here's the Data

When families search for a nursing home, the first number they see is usually the CMS Five-Star Quality Rating. Five stars feels straightforward — more is better. And that's largely true. But the five-star system is a composite score built from three separate components: health inspections, staffing, and quality measures. A facility can score well overall while performing poorly on the metric that predicts resident outcomes most directly: how many nurses are actually in the building.

Staffing ratios don't make headlines. They are less intuitive than a star rating. But decades of research — and CMS's own data — shows they are one of the most reliable signals of whether a facility will keep your loved one safe.

Staffing ratios measure how many hours of nursing care each resident receives per day, on average. CMS tracks and publishes three key numbers for every Medicare-certified nursing home:

• Total nurse staffing hours per resident per day — includes RNs, LPNs, and certified nursing assistants (CNAs)
• RN hours per resident per day — registered nurses only, who provide the highest level of clinical assessment and oversight
• Total nurse aide hours per resident per day — CNAs who provide most of the hands-on daily care

These numbers matter because nursing care is not interchangeable. A registered nurse can assess a wound and catch early signs of sepsis. A nursing aide cannot. A facility with low RN hours may be adequately staffed on paper while missing the clinical oversight that prevents serious harm.

• Research published in Health Affairs and the New England Journal of Medicine has consistently found that higher RN staffing hours are associated with lower rates of:
• Pressure ulcers (bed sores)
• Falls with injury
• Hospital readmissions
• Restraint use
• Infection rates
• Resident deaths

In 2024, CMS finalized the first-ever federal minimum staffing rule for nursing homes — a historic change after decades of advocacy. The final rule requires:

• 0.55 RN hours per resident per day
• 2.45 total nurse aide hours per resident per day
• At least one registered nurse on-site 24 hours per day, 7 days per week

Prior to this rule, there was no federal minimum — only a requirement that a facility have "sufficient" staff. The new minimums are phased in over several years, with rural and lower-income facilities given additional time.

Here's the important context: 0.55 RN hours per resident per day is a floor, not a goal. The national average before the rule was around 0.7 RN hours — and research suggests that 0.8 to 1.0+ hours is associated with meaningfully better outcomes. Facilities exceeding the minimum are worth noting.

A 2021 analysis of CMS data found that staffing star ratings — particularly the RN component — outperformed overall star ratings in predicting adverse outcomes for residents. Facilities with 5-star overall ratings but low staffing scores had worse infection rates, higher readmission rates, and more serious deficiency citations than facilities with 4-star overall ratings and high staffing.

A study published in JAMA found that for every 0.1-hour increase in RN staffing per resident per day, there was a measurable reduction in hospital readmissions.

The practical implication: when comparing two facilities, look at the staffing component separately — not just the overall score. A facility that scores high on health inspections and quality measures but low on staffing may be harder to maintain that performance under pressure. Facilities that invest in nursing staff tend to be ones that invest in care.

When evaluating a facility, focus on these specific numbers from CMS data (available on every facility page on Placet):

• RN hours per resident per day above 0.7 — significantly above the 0.55 federal minimum, suggesting the facility invests in nursing oversight
• Total nurse staffing above 3.5 hours per resident per day — a reasonable threshold for adequate care coverage
• Weekend staffing consistency — CMS now tracks weekend staffing separately. Facilities with significantly lower weekend staffing may be cutting corners when oversight is reduced
• Staffing trend — is the facility maintaining or improving its staffing? Declining numbers over time are a warning sign

Also ask the facility directly: what is your current staff-to-resident ratio on the night shift? What is your CNA turnover rate? High turnover means residents are frequently cared for by unfamiliar staff — which increases safety risks and reduces the continuity that good care requires.

Staffing is primarily a financial decision. Nursing staff is the largest cost driver in nursing home operations, typically representing 60–70% of operating expenses. Facilities that prioritize cost reduction over care investment often do so by reducing hours and relying on agency (temporary) staff.

Private equity-owned nursing homes have come under particular scrutiny in this area. Multiple peer-reviewed studies — including a 2021 analysis published in Health Affairs — found that private equity-owned facilities had lower staffing levels, higher penalty rates, and worse resident outcomes on average compared to non-profit and independent facilities.

Ownership structure is now publicly available for every Medicare-certified facility. Placet surfaces this information alongside staffing data so families can make fully informed comparisons.

Every Medicare-certified nursing home's staffing data is published by CMS and updated quarterly. You can look up:

• Total and RN-specific hours per resident per day
• Weekend staffing levels
• The facility's staffing star rating (1–5)
• Historical staffing trends

This data is available on the Placet facility page for every SNF in the country. When comparing facilities, sort by RN hours per resident per day alongside inspection history — that combination gives you a much more complete picture than the overall star rating alone.