The phrase "associated with certain levels" is correct and usable in written English.
It can be used when discussing relationships or connections between different levels of something, such as performance, risk, or measurement.
Example: "The results of the study indicate that higher stress levels are associated with certain levels of anxiety."
Alternatives: "linked to specific levels" or "connected with particular levels".
Physical activity and fitness have been found independently associated with certain blood lipid levels among children and adolescents [ 6].
This can be a problem when the participation of the GPs is associated with certain patient characteristics (education level, co-morbidity).
Further research on the effects of pediatric lead exposure on IQ specifically has quantified the average IQ loss associated with certain changes in blood lead level.
For example, decreased plasma Acrp30 levels are associated with certain insulin resistant states such as type 2 diabetes and coronary artery disease (Kadowaki and Yamauchi, 2005).
In addition, circulating leptin levels have been associated with certain life-style factors, such as smoking and alcohol intake [ 34].
It has never been assumed that certain concentrations of indicator organisms above these levels are inevitably associated with certain predictable risks.
Low levels of MA/1-binding CEA have been found in serum from normal individuals and moderately raised levels are sometimes associated with certain non-malignant diseases.
The geographic analyses of cancer registry data provide some evidence that higher PFOA serum levels may be associated with certain cancers.
Type II pneumocytes have an intriguing role in lung disease, as anomalies in pulmonary surfactant protein levels have been associated with certain respiratory diseases frequently observed in smokers [ 31].
The second issue that arose was that girls tended to wonder at the level of 'hardship' associated with certain profiles especially in relation to their private lives.
