More than a million public records were used to assess whether nursing homes were meeting state staffing minimums.

The KFF Health News data analysis focused on five states with the most rigorous staffing requirements: California, Florida, Massachusetts, New York and Rhode Island.

To determine staffing levels, the analysis used the daily payroll journals that each nursing home is required to submit to the federal government. These publicly available records include the number of hours each category of nursing home employee, including registered nurses and certified nursing assistants, worked each day and the number of residents in each home. We used the most recent data, which included a combined 1.3 million records covering the final three months of 2023.

We calculated staffing levels by following each state’s rules, which specify which occupations are counted and what minimums homes must meet. The analysis differed for each state. Massachusetts, for instance, has a separate requirement for the minimum number of hours of care registered nurses must provide each day.

In California, we used state enforcement action records to identify homes that had been fined for not meeting its law. We also tallied how many California homes had been granted waivers from the law because they couldn’t find enough workers to hire.

For each state and Washington, D.C., we calculated what proportion of homes complied with state or district law. We shared our conclusions with each state’s nursing home regulatory agency and gave them an opportunity to respond.

This analysis was done by Jordan Rau, a senior correspondent, and Holly K. Hacker, a data editor, both with KFF Health News, part of KFF, a nonprofit health-policy research, polling and news organization.