"did not differ markedly" is a grammatically correct and appropriate phrase to use in written English.
You can use it to indicate that two objects by comparison were similar in quality or characteristic. For example, "The flavor of the two wines did not differ markedly."
This risk did not differ markedly when different control subgroups (musculoskeletal disorders, circulatory disorders, digestive disorders, or trauma) were excluded.
The percentage of macrophages associated with particles did not differ markedly between the different particle types).
The estimated proportional makeup of different fruit species did not differ markedly from these values when a resampling approach was taken (Supplementary Table 1).
The prevalence of MetS in Seychelles did not differ markedly according to the three different MetS definitions, consistent with observations in several populations [ 5, 9, 10, 14, 17], but not in others [ 4- 7, 12, 13].
Comparing self-reported vs. GPS data, the estimation of personal exposure to PB-PAH did not differ markedly at the population level, but the difference was large at an individual level, which has significant implications in air pollution epidemiological studies.
Likewise, analyses under more realistic models of sequence evolution, taking into account differences in evolution between stem and loop regions of rRNA, did not differ markedly from analyses using standard four-state models.
Their altitudes did not differ markedly between day and night, but the researchers noted that they tended to circle more in daylight hours, and soar the highest during the hour before sunset.
The content of the campaign revolved less around party platforms or the candidates' prescriptions for the future, which in any case did not differ markedly, and far more around their supposed public and private misdeeds in the past.
His successor, Aboud Jumbe, had been a leading member of Karume's government, and, while his policies did not differ markedly from those of Karume, they appeared to be moving gradually closer into line with mainland practices.
The size of the exosomes did not differ markedly.
The simple and focal species plans did not differ markedly in terms of representation, but diverged when completeness and overlap were considered.
