A study was done where the sale of anti-asthma drug was recorded and the number of deaths because of asthma was measured over a period of 15 years (1975-1990). This is which type of study.
High-Yield Explanation
No explanation provided.
Related Dental MCQs
Seasonal trend is:
General
In primary tooth, intrusion is common because:
General
Trench mouth is other name for?
General
Most of the dental cements are set by an acid-base reaction except:
General
Statement 1: Stabilization by splinting is usually done for 7 to 14 days after avulsion.
St...
General