The mental health trust that serves Brighton and Hove said that it was seeing more patients and assessing and treating them more quickly than ever before.
Sussex Partnership NHS Foundation Trust said that it was meeting all its “priority service indicators”.
It said: “All urgent patients who have been referred by GPs urgently are seen within four hours while all non-urgent cases are seen within four weeks.
“The foundation trust is treating more patients with psychosis much earlier in their onset of symptoms and ensuring that patients receive care in the most appropriate care settings.
“Meanwhile, sickness absence among staff is continuing to fall from around 5 per cent in January to less than 3.5 per cent now.”
Sue Morris, executive director of corporate services at the trust, said: “It is easy to be overwhelmed by the number of indicators that measure how the NHS performs.
“But there are some that provide a very clear snapshot of how a foundation trust is doing at any point in time.
“I’m very pleased that Sussex Partnership continues to achieve targets across almost all the main priority performance indicators.
“We take these indicators extremely seriously in the knowledge that if we can maintain our performance with these we know that the quality of outcome for our patients and carers and the organisation is financially sound, though there will always be room for improvement.
“Achieving these targets is the springboard to ever higher standards of service.”
“The improvement in staff sickness absence rates is particularly encouraging.
“It appears to be a continuing trend since the winter months and we are working closely with our staff providing support to maintain this progress.”
The trust, which treats mental health patients, people with learning disabilities, alcoholics and drug addicts, said that it in May it met its performance targets in seven priority areas.