Scotland's accident and emergency (A&E) departments missed a key waiting times target in December.
Figures show that of the 130,848 people who attended A&E that month, 92.6% were seen and either admitted, transferred or discharged within four hours.
The figure is below the Scottish Government target for 95% of cases to be dealt with in that time.
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Performance was also down on the previous month (93.6%) and lower than that recorded in December 2015 (94.9%).
Over the month, 891 (0.7%) patients spent more than eight hours in A&E while 144 waited more than 12 hours.
Health Secretary Shona Robison said: "It is testament to the dedication of our NHS staff that 92.6% of patients were seen within four hours in what was the busiest December for four years.
"The figures also show that our A&E departments continue to outperform other areas of the UK and have done so for the last 21 consecutive months of published statistics.
"We are committed to long-term, sustainable change put in place in order to maintain high levels of performance during peaks and troughs of activity. We have put record investment and increased levels of staffing into our hospitals to achieve this - including an extra £3 million for health boards to support preparations over winter.
"We know that a small number of sites are still facing particular challenges with demand and performance, and the Government is working closely with those health boards to provide any additional support required."
Separate weekly figures show 92.5% of people were seen in the target time in the seven days ending January 29.
During the week, NHS Forth Valley was the poorest performing health board (85.5%) while the Queen Elizabeth University Hospital in Glasgow recorded the lowest compliance of any site at 83.5%, an improvement on 78.7% the previous week.