Nice has accepted much the main arguments made by groups like the Safe Staffing Alliance, which campaigned for no more than one nurse to eight adult inpatients.
The watchdog spent months looking at evidence on the impact staff numbers have on the quality and the safety of the care patients receive.
Susan Osborne, the chair of the Safe Staffing Alliance, which includes the Royal College of Nursing (RCN), the health union Unison and the Patients Association, said: "A 1:8 ratio still means that the nurse only has seven and a half minutes per patient per hour, which is too little.
"If it's more than eight then patients won't get fed, care plans won't get written, and nurses can't sit and talk to patients and reassure them about their condition. Care just won't be given to a proper standard, and patients can die."
More top news
Detectives in Westminster are investigating after the man was discovered on the Route 189 bus in Marylebone shortly after midnight.
The murderer was shaking and appeared to be gasping for air for around 13 minutes before dying.
The positive results come after Chancellor Philip Hammond admitted the government is prepared to sell its stake at a loss to the taxpayer.