The phrase "concomitant variations" is correct and usable in written English.
It can be used in contexts discussing relationships between two or more variables that change together.
Example: "The study revealed concomitant variations in temperature and humidity levels throughout the year."
Alternatives: "correlated changes" or "simultaneous variations."
A theoretical model was designed, which allowed the effects of HRT and COD to be distinguished in the complex experimental data obtained with concomitant variations of the two parameters.
The comparison of the pattern of expression in the three different groups of rats between the DNA microarray and the qPCR analysis established that all the genes displaying variations in their expression pattern in the transcriptomic analysis were also showing concomitant variations by qPCR analysis (Fig. 4).
Genetic manipulation of the Notch pathway led to concomitant variations in N-cadherin and α9-integrin.
When nitrogen content in the media was modified, cultured placentas showed concomitant variations in CAPs contents.
The present results also demonstrate that this relationship is preserved for concomitant variations of plant LAI and height.
Protein level changes were mainly the consequence of post-translational mechanisms because corresponding mRNAs did not show concomitant variations with respect to control.
A concomitant variation of the photoluminescence emission in the blue is observed.
A considerable negative partial correlation between the grazer effects on NAP and on species composition persisted even after accounting for the concomitant variation in soil moisture, both as the Bray-Curtis dissimilarity (R = −0.36, P = 0.06) and as the Sørensen dissimilarity (R = −0.38, P = 0.06).
One of the oldest such attempts is due to John Stuart Mill (1996 [1843]), who presented a systematic account of causal inference that consisted of five different so-called "methods": the Method of Agreement, the Method of Difference, the Joint Method of Agreement and of Difference, the Method of Residues, and the Method Concomitant Variation.
In other words, heat applied to a large surface area increases the pain thresholds elicited from a much smaller surface area (∼50 times), without concomitant variation of the corresponding psychophysical latencies.
Warming the whole hand increased both TψA and TψC pain thresholds without a concomitant variation in the corresponding psychophysical latencies but accompanied by a slight increase of the domain of the responses elicited by Aδ-fibers.
