The new NHS "Friends and Family" rating, which was designed to shine the spotlight on poor care in hospitals, has been slammed as "misleading" by the Patients Association.
The charity said that the results - published for the first time today - were "confusing to navigate" - with the overall ratings not always clearly related to the individual survey results.
Nine in every 10 patients who attended the hospital with the "worst" A&E department in the country would recommend that their friends and family should seek treatment at the hospital.
Chase Farm Hospital in north London was the only accident and emergency ward in England to receive a "negative" score.
But of the 516 of patients who were asked whether or not they would recommend the hospital, 295 said they were "extremely likely" and 167 said they would be "likely" to encourage their loved ones to seek treatment there - a total of 89.5%.