"improved to some extent" is a correct and usable phrase in written English.
It can be used to indicate that something has been improved to a certain degree, but not completely. This phrase can be used in many different contexts, such as in a report, an essay, or a conversation. Example: Although the company's profits have improved to some extent, there is still room for growth in the upcoming months.
With this approach, and with diagnostic and therapeutic improvements (Greco and Hainsworth, 2001b), prognosis seems to have improved to some extent.
The situation has improved to some extent, for example with the use of Mastiff armoured vehicles.
Therefore, the rate performance of the LIB is improved to some extent.
Atomic force microscopy shows that their appearances are smooth and compact, and improved to some extent.
It had been a poor game up to that point, and it improved to some extent after as Bolton searched for an equaliser that did not come.
The fatigue life and strength was also improved to some extent by the presence of the graded coating at higher stress levels (475 MPa–525 MPa).
In this perspective, targeting mentalization, known to be altered in this population [ 9, 40] may improve to some extent cognitive, emotional and behavioral attitudes related to attachment.
It is possible that the increase in quality of life represents spontaneous remission where patients seeking help at crisis point tend to inevitably improve to some extent because they cannot become worse.
Since the controls showed no change in self-reported levels of physical and cognitive activity but did improve to some extent on some secondary outcome measures, increases in activity level cannot account for the other benefits identified in the control condition.
If you had told me two years ago that I'd be drinking a no-alcohol beer with as much pleasure as a full-strength one, I'd have said you were bonkers, but the quality has improved to such an extent that some are now almost indistinguishable from their full-strength equivalents.
Communication skills training did improved competence to some extent but student gender was a better predictor, with female students rated as more competent, empathic and warmer than male students.
