Little more than half of NHS professionals in Wales are happy with the standard of care the health service provides to patients.
According to an internal study commissioned by the NHS, 52 per cent feel care quality is substandard.
It also found that a third of workers have had to take time off with stress in the past year.
"It isn't satisfactory that just over half of people working in our NHS positively think that what they provide would be good for somebody in their family," said health minister Mark Drakeford.
He added that the findings are consistent with other areas in the UK and show that the NHS is under major pressure.
Some 64 per cent of respondents said that they are happy with their job, but just less than half said that they would recommend working for the NHS to other people.
Just under half (48 per cent) said they often do not have enough time to complete their work in a matter that is satisfactory.
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