The phrase "unfortunate result" is correct and commonly used in written English.
Example: The team's lack of preparation was an unfortunate result, as they lost the game by a large margin.
That's an unfortunate result.
The unfortunate result is that tests become the curriculum.
The unfortunate result is that today everyone has to pay to access and read the law.
The unfortunate result: Some patients experience more pain and are possibly more prone to opioid abuse.
As a result, they buy fewer shoes, with the unfortunate result of hitting local shoe shops.
The unfortunate result is that, as far as I can see, we've gone backwards.
The unfortunate result is a light comic lark played as if it were a laugh riot.
The tuna sandwich is the El Camino of dishes -- two ideas colliding in an unfortunate result.
One unfortunate result: the wagon moves out almost too abruptly on takeoff from a stop.
The unfortunate result is that the opportunity for collective and organizational learning and improvement is lost.
The unfortunate result in most situations is that we no longer can lead with changes that benefit patients.
