There has been a small increase in the percentage of NHS Grampian patients being seen within four hours at the region’s A&Es.
Latest official figures show 93.4% of north-east A&E patients were treated or discharged within four hours in July.
That compares with 93.2% in June. The standard is 95%.
NHS Grampian ranks seventh out of 14 Scottish health boards for the figure.
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Royal College of Emergency Medicine Scotland vice president Dr David Chung said: “This summer, emergency departments across Scotland have been operating at maximum capacity.
“What we feared might be a blip in performance is becoming something more worrying.”
A Scottish Government spokesman said: “While we can expect to see periods of fluctuation, hospitals continue to work hard to ensure sustained improvements.”