Table 3

Adjusted ORs indicating the change in the odds of a patient death following a change in the nursing staff fill-rate

Outcome: patient death
OR95% CIP value
Fill-rate (ppt) for all staff0.99340.9794 to 1.00760.3605
Fill-rate (ppt) for:
 Healthcare support workers (HCSWs)1.00290.9964 to 1.00950.3748
 Registered nurses (RNs)0.98830.9773 to 0.99960.0416
Share (ppt) of rostered hours for HCSWs worked by:
 Local/Regular1.00280.9961 to 1.00950.4167
 Bank1.00300.9963 to 1.00970.3834
 Agency1.00210.9907 to 1.01370.7208
Share (ppt) of rostered hours for RNs worked by:
 Local/Regular0.98750.9757 to 0.99940.0389
 Bank0.98610.9729 to 0.99950.0427
 Agency0.99130.9797 to 1.00310.1464
Share (ppt) of rostered hours for RNs worked by:
 Band 50.98930.9771 to 1.00170.0907
 Band 60.98450.9714 to 0.99770.0214
 Bands 7 and 80.97600.9551 to 0.99730.0275
  • Results listed are from five separate conditional logistic regression models, each with ward fixed effects. Unit of analysis is the hospital ward-day (n=19 287). HCSWs, defined as those in NHS pay bands 2–4. RNs, defined as those in NHS pay band 5 and above. 95% CI, with SEs clustered at the hospital ward level. All models also control for the mean patient age; the patient age squared; the sex and ethnicity mix of patients; the mean Elixhauser Comorbidity Index; pairwise-interaction terms between mean age, sex, ethnicity and Elixhauser Comorbidity Index; the mean hospital length of stay of patients treated in the ward that day; the number of patients treated in the ward that day; a dummy for each day of the week; a dummy for month of the year and a dummy indicating whether the day was a bank holiday. Fill-rate is defined as the number of actual hours worked divided by the number of planned (rostered) hours. The fill-rate for healthcare support workers and registered nurses is calculated relative to the planned hours for staff of that type.

  • NHS, National Health Service; ppt, percentage point.