'compromise the validity' is a correct and usable phrase in written English.
You could use it to describe how something may undermine the credibility or trustworthiness of something else. For example, "The inclusion of anecdotal evidence in the study compromises the validity of the results."
How can we truthfully concede that differing testing dates do not compromise the validity and integrity of the assessment process?
Disregarding these important factors may seriously compromise the validity of conclusions based solely on laboratory experimental results.
If the dropout rate is high, a wrong assumption about the missing data may compromise the validity of statistical inferences.
If they sign at different times it is invalid; if any witness is a beneficiary, it can compromise the validity of the will.
Pfizer said any discrepancies noted by FDA "did not compromise the validity of the trial or its conclusions". The FDA would not discuss why it never approved marketing Trovan for children--such specifics are considered corporate secrets.
Detector saturation, contamination of the sample with drilling fluid, and suppression of both Tmax and vitrinite reflectance, are examples of complications that could compromise the validity of the results and the play or prospect reviews derived from them.
However, insufficient understanding of the designs could compromise the validity of the rating.
Fortunately, these errors are not significant enough to compromise the validity of the calculation results.
Poor implementation can dilute the impact of a well-designed intervention and compromise the validity of a well-planned evaluation.
However, current WLAN solutions present a series of performance issues, sometimes difficult to predict in advance, that may compromise the validity of the results gathered.
Friedman and Scedrov have shown, for example, that the addition of large set axioms does not compromise the validity of the disjunction and numerical existence properties for IZF.
