The phrase "as some studies indicate" is correct and usable in written English.
You can use it when referencing findings or conclusions drawn from research studies to support a statement or argument.
Example: "The effectiveness of this treatment is still debated, as some studies indicate that it may not be as beneficial as previously thought."
Alternatives: "as certain research suggests" or "as various studies show".
Anecdotal accounts, as well as some studies, indicate that many students do not read written feedback, much less use it to improve future work (MacDonald, 1991; Crisp, 2007).
The effects of Chlamydia trachomatis, Toxoplasma gondii, human papillomavirus, herpes simplex virus, parvovirus B19, Hepatitis B and polyomavirus BK infections remain controversial, as some studies indicate increased miscarriage risk and others show no increased risk.
As mentioned earlier, some studies indicate that melatonin itself has antitumor effects [ 78].
For example, some studies indicate that as many as 30percentt of those with high blood pressure (specifically, the type known as sodium-sensitive hypertension) can control it by lowering their salt intake.
Loses from senior financial exploitation in the U.S. alone totals somewhere between $2.9 and $36.48 billion annually, somewhere between 2% and 10% of American seniors are abused, and some studies indicate that as few as 1 in 44 cases of instances of financial exploitation are reported.
As regards the immunity conferred, some studies indicate that it is high[ 5] but this is not yet clear[ 10] and it would seem that at least two doses of vaccine are needed[ 11, 12].
Direct evidence ascertaining the relationship between age and infection with Francisella in humans is difficult to interpret as some studies indicated a positive correlation between Francisella infection and age and others a negative one [23], [24], [25].
As some studies indicated, HIV/AIDS has changed individual's lifestyles and quality of life.
Accordingly, medication with TNF-blocking agents should not be performed in the context of serious or opportunistic infections or of septic complications, such as septic arthritis, infected prostheses, acute abscesses or osteo-myelitis, as some studies indicated that certain sites may show serious infections more frequently, including the skin, soft tissues and joints [ 24].
As for PM10, some studies indicated a significant increase in the relative odds of LBW, whereas others indicated no association.
In fact, as reported in the systematic review, some studies indicated that use of HCs in women with migraine is associated with further increase in the risk of ischemic stroke [17, 34].
