# The term ‘secular trend’ implies:
A. Being liberal minded in diagnosing
B. Cold professional attitude
C. Changes in occurrence over a long period of time
D. Migration from rural areas
The correct answer is C. Changes in occurrence over a long period of time.
Long term or secular trends refers to changes in disease frequency that occurs gradually over long periods of time. Oral cancer is an example of disease which has shown a consistent upward trend during the past years, whereas diseases like tuberculosis, typhoid, polio and diphtheria have shown a downward trend.
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