The phrase "affect the significance of" is correct and usable in written English.
You can use it when discussing how one factor or event influences the importance or meaning of another factor or event.
Example: "The new evidence may affect the significance of the previous findings in the study."
Alternatives: "influence the importance of" or "impact the meaning of".
Including the gender of the network member, and whether or not the participant and network member were the same gender, did not affect the significance of these interactions, and these variables were not significant in themselves.
When baseline results were included as a covariate for comparison of the two groups for the primary outcome variables and those for which a statistically significant result was observed, this did not affect the significance of the result for the tested variable.
As this factor had no statistically significant effect on any outcomes and did not affect the significance of any models, it was not included in the final regression analyses.
BMI was a significant covariate term in all models but did not affect the significance of the relationship between lipid levels and HbA1c.
However, there are some errors in their analysis, which are likely to affect the significance of their proposed ranking.
Inclusion of atrial fibrillation during follow-up in the multivariable model did not affect the significance of treatment assignment as a predictor of thromboembolism.
Quite apart from entry, there is another aspect of the market structure relevant here that affects the significance of the percentage figures cited by the Court.
Another aspect that affects the significance of test scores is that some people are "test-anxious" and may do poorly on almost any standardized test.
A high difference between A horizon thickness variances in the sample area and the validation area affected the significance of the variation test in the univariate and multivariate results.
