The phrase "about the variations in" is correct and usable in written English.
It can be used when discussing differences or changes in a particular subject or topic.
Example: "The research paper focuses on the variations in climate patterns over the last century."
Alternatives: "regarding the differences in" or "concerning the changes in".
Guidelines for managing cystic fibrosis (CF) patients have been widely circulated, but little is known about the variations in practice between sites and their association with outcomes.
A chart on Dec. 10 comparing New York hospital charges for a routine neonatal case in 2011, which accompanied an article about the variations in pricing, referred incompletely to one hospital, Good Samaritan.
As the design of label-free DNA biosensors matures, and their sizes reduced to enhance their sensitivity, not much has been researched about the variations in the received signal with the positioning of the probes on the sensitive surface.
The comparison between parallax histogram, derived from each key frame, allows us to make a statistic about the variations in objects depth and, consequently, quantify the probability of visual discomfort appearance when observing the sequence.
"This report shows evidence of very good care but I am seriously concerned about the variations in care, and improvements are needed in the way some clinicians communicate with patients and support families.
There are serious concerns about the variations in the properties of this antibody both batch to batch and between suppliers.
Recent studies have refined Fisher's ideas about how the variations in PTC sensitivity evolved.
Information about the variation in the risk for venous thromboembolism (VTE) and in prophylaxis practices around the world is scarce.
At the press conference to launch the report Lord Hall was asked about the variation in salaries paid to the Today programme team.
Caesarean section: The Government is concerned about the variation in caesarean section rates between hospitals and has a programme in hand to address this and the reasons for the rise in caesarean section rate overall.
A mid-term problem set will require students to analyze the data from a recent applied paper to answer some simple questions about the variation in key economic variables and the authors' identification strategy.
