"most extant studies" is a correct and usable phrase in written English.
You can use it when referring to studies or research that are still widely available or in existence. For example, "most extant studies on the history of early farming techniques provide valuable insight into the advances made by ancient civilizations."
In most extant profiling studies, the number of transcripts monitored exceeds the number of available profiles (N ≫ T).
While most of the extant studies on improvisation have stressed the wisdom of improvised choices, not all improvisations are so successful.
Different from the extant studies most of which focus on how to make specific policies towards low-carbon city, this article, based on archival analysis on government documents and field interviews across ten cities, provides a systematic review on China's current low-carbon city policies.
The present study tests the independence assumption using several different statistics and, contrary to most extant models of whole report, finds significant positive dependence.
Our study suggests that most extant "opisthobranch" taxa, e.g. Sacoglossa, Cephalaspidea s.s., Pteropoda, Umbraculoidea and Anaspidea, have a Mesozoic origin.
Yet most extant samples are small or based upon low-risk populations, and few studies address the potential role of maternal weight during pregnancy in their study designs or sampling strategy.
This latter finding is inconsistent with prior studies and may be attributable to the failure of most extant research to account for experiences of non-physical types of intimate partner abuse in their models [ 32].
In most extant bryozoans the zooids are not cylindrical but flat, with rigid side walls.
"This bed stands apart from most extant examples in its grandeur, historical importance and decoration," Marcus Flacks said.
Dental wear provides a unique record of oral behaviour, available for most extant and fossil mammals.
