The phrase "a true increase in" is correct and usable in written English.
It can be used when discussing a genuine or significant rise in a particular metric or value.
Example: "The company reported a true increase in sales this quarter compared to the last."
Alternatives: "an actual rise in" or "a genuine growth in".
However, increased diagnoses might also result from increased presentations to primary care due to a true increase in disorders.
The most plausible explanation for this is the increased rate of detection of vertebral fractures, rather than a true increase in incidence.
They do not rule out the possibility of a true increase in autism.
A new study provides some of the first solid scientific evidence for a true increase in autism.
But it is hard to believe that this increased rate is not at least in part due to a true increase in the amount of illness.
They noted that if there were a true increase in thyroid cancer, the rise would be reflected in patients at every stage of the disease.
In a report to the California Legislature in 2002, Dr. Byrd and his colleagues concluded that "some, if not all, of the observed increase represents a true increase in cases of autism in California".
However, it is not known whether there has been a true increase in the incidence of the disorder, since the increase could be due to the use of broader diagnostic criteria or other factors.
Further, it is unclear whether an increase in rates reflects a true increase in the illness or more diagnostic attention.
Therefore, the increase we report may reflect an increase in the percentage of SRCs presenting to the ED after the implementation of the law rather than a true increase in SRC occurrence.
Further, it is unclear whether a possible increase in the prevalence of the diagnosis of pediatric bipolar disorder reflects a true increase in the incidence of bipolar disorder or is a result of increased diagnostic attention.
