"remained approximately the same" is correct and can be used in written English.
You can use this phrase to indicate that something has not changed significantly. For example: "The population of the town remained approximately the same over the last decade."
It cites surveys that say the prevalence of such behavior has remained approximately the same over time.
The faulted loop density increased with dose from 1 dpa up to 10 dpa where it saturated and remained approximately the same until 20 dpa.
Intracellular PHB accumulated under polymer production conditions remained approximately the same (~80% cdw) in Re2005/pER3, Re2005/pER4 and Re2005/pBBR1MCS2.
Statistical significance was lost when excluding studies of malignancies other than breast cancer or hematological malignancies and excluding studies with Newcastle-Ottawa scores <8, but the direction of effect and magnitude remained approximately the same.
Between 1980 and 2006, the area capacity remained approximately the same since the increase of urbanization was compensated by the change of land cover from agriculture to shrubs, brought on by the abandonment of crops.
While in the control group the number of activities between T1 and T2 remained approximately the same, the number of nighttime activities in the intervention group increased in the second phase to a level above the initial T0.
Multilayered coatings of different blends generated several release peaks, with their temporal occurrence remaining approximately the same when layers of other hydrophobicity were added above or below.
Figure 5 shows that the order of the ISMs for their relative performance would remain approximately the same no matter what error threshold is selected.
As both species grow in size the relative canal lengths will remain approximately the same but the absolute canal length difference will increase in magnitude signifying an increase in sensitivity.
If this alternative hypothesis is correct, reducing predator abundance could result in increased survival of non-territorial or peripheral individuals, but the density of coral-killing algal gardeners should remain approximately the same over a broad range of predation intensities.
By virtue of the nucleotypic effect, the nucleus should undergo a 2-fold volumetric shrinkage, which translates into doubling the concentration of the TF and its targets while the concentration of nsDNA will remain approximately the same (i.e. half DNA amount, as compared to the tetraploid, in half the volume).
