The fact that some patients admitted at the weekend may be more seriously ill could also be a factor, the researchers added.
It says the service would be safer under a seven-day system, citing evidence that mortality rates are higher for patients admitted at weekends.
"There is evidence that patients admitted at weekends are sicker and the weekend effect may therefore have a 'community dimension'," he said.
It is a five-year study into the resources needed to deliver a more fully-functioning NHS at weekends and the greater risk of patients admitted at the weekend dying within 30 days.
But it also pointed out that the much greater likelihood that patients admitted at the weekend will be medical emergencies, and at higher risk of dying, were important factors too.
Dr Andrew Goddard, director of medical workforce at the Royal College of Physicians, said: "Patients admitted at weekends are more likely to die following admission than patients admitted during the week.
The odds (95% confidence interval) of community discharge for patients admitted at the highest compared with the lowest stage varied from 2.1 (1.9[ndash ]2.2) to 3.1 (2.9[ndepending), depending on the domain.
This research aims to apply the definition proposed by the Acute Kidney Injury Network (AKIN) research group to assess the incidence, risk factors, and outcomes in acute kidney injury (AKI) patients admitted at the intensive care unit (ICU).
There were 9 to 12 patients admitted at the ICU during these shifts.
Patients admitted at the ICU after cardiac surgery had a conventional right IJV catheter.
In addition, patients admitted at times of bed shortage had shorter stays, were sicker at discharge than patients admitted at times of greater bed availability, and may have a greater risk of early readmission [14, 15].
