The phrase "ascertained a significant" is correct and usable in written English.
It can be used when discussing findings or conclusions that reveal important information or insights in a particular context, such as research or analysis.
Example: "The researchers ascertained a significant correlation between the two variables, leading to new insights in the field."
Alternatives: "determined a substantial" or "identified a noteworthy".
After ascertaining a significant worsening of ratings after the crisis, the paper hypothesises the possibility that this worsening is due not exclusively to a deterioration in the banks' credit quality, but also to a change in the behaviour of the rating agencies.
In parallel to previous studies [ 9], we did not ascertain a significant difference in prognosis between asymptomatic and symptomatic patients.
Although we observed a marginal relationship between epithelial gap density and the number of flares in the follow-up period, our study was not designed to evaluate this end point, and may be underpowered to ascertain a significant relationship.
"The extent of un-hedged exchange rate exposure in the corporate sector cannot be ascertained with a significant degree of confidence, given that systematic and comprehensive information on relevant offsetting variables (notably natural hedges from net export proceeds, foreign currency income from multinational operations and FX derivative positions) is not simple to construct".
Moreover, to ascertain whether a significant change has occurred may require several months of nPCR and Kt/V urea level monitoring.
A two-sided Pearson χ test of association was used to ascertain any significant (p<0.05) differences in player responses across allocated programmes.
A Multivariate Analysis of Variance (MANOVA) was performed with the three LSOs as dependant variables and each type of grouping variable (Participation/Control/Instructor) as fixed factors to ascertain any significant differences of LSO between groupings.
We did not ascertain any significant hemodynamic effects during continuous rotation or manual turning.
Sequencing e.g. by Next Generation Sequencing methods is likely to play a significant role in ascertaining a genetic diagnosis for these patients in an affordable and timely manner.
