The phrase "associations mostly" is correct and usable in written English.
It can be used when discussing the prevalence or frequency of certain associations in a particular context.
Example: "In our study, we found that associations mostly formed around shared interests and experiences."
Alternatives: "primarily associations" or "associations predominantly".
At present Bouchard has only a handful of brand associations, mostly tennis equipment-related, albeit of a high-profile nature.
Several significant haplotype associations, mostly spanning two areas of the TFPI gene, were identified (Figure 2).
Associations mostly were log linear in subgroups defined by sex and diabetes status.
However, these associations mostly disappeared once other potential confounders were adjusted for in multivariate analyses.
Consistent risk factors for post-ICU psychological morbidity have not been definitively established [ 13, 14], with associations mostly detected in very few studies.
Furthermore, our recent analysis of journals from different research fields, including social sciences and humanities, also demonstrated that authorship definitions by journals, publisher and professional organizations or associations mostly addressed research and/or writing as contributions necessary for authorship [ 14].
This association mostly disappeared after 2001.
President Obama, speaking to the American Medical Association (mostly about health care, such as it is), listed "video games" as a potential bad guy… for your health.
The flag trade association mostly focuses on promoting and properly labeling American-made flags.
The efficiency of genome-wide marker-trait association mostly depends on SNP marker density and distribution.
In southern Arizona, triatomine bugs live in association mostly with the white-throated woodrat (Neotoma albigula) (24, 26 ).
