The phrase "a dramatic deterioration in" is correct and usable in written English.
It can be used to describe a significant decline or worsening in a particular situation, condition, or quality.
Example: "The report highlighted a dramatic deterioration in the air quality over the past year."
Alternatives: "a significant decline in" or "a severe worsening of".
The UN has warned of a dramatic deterioration in the humanitarian situation.
Sainsbury's has experienced a dramatic deterioration in sales performance according to market data from Kantar Worldpanel.
There had been, he said, a dramatic deterioration in the period leading up to privatisation.
"Azerbaijan's government has escalated repression against its critics, marking a dramatic deterioration in an already poor rights record.
The combination of conflict, economic and climatic crises also led to a dramatic deterioration in humanitarian conditions.
The statement pointed to a dramatic deterioration in the situation since July, pointing out that about 100,000 people remain displaced from their shattered homes.
The expedition to Jerusalem, he argues, was conceived of not by the Pope but by the Emperor Alexios I Komnenos, in response to a dramatic deterioration of Byzantium's position in Asia Minor and also as a result of the a state of near anarchy at the imperial court where plans to depose Alexios or even murder him were an open secret by 1094.
It is difficult to establish accurate data on salaries during this period, but there was without doubt a dramatic deterioration of salary level in relation to the cost of living.
The automaker prefers to restructure out of court, and it said bankruptcy would result in a dramatic deterioration of revenue amid the worst auto sales environment in decades.
Unfortunately, updating only the bounding primitive can result in a degradation of the quality of the BVH, and in some scenes will result in a dramatic deterioration of rendering performance.
Nor does he offer any explanation for an apparently dramatic deterioration in MacGowan's mental health during the late 80s, which left the singer, to all intents and purposes, unable to record or perform live, although a contemporary feature by Nick Kent suggested the problem might have been linked to MacGowan adding vast quantities of LSD to his already groaning smorgasbord of intoxicants.
