Rural-Urban Differences in Neuroimmune Biomarkers and Health Status Among Women Living With Breast Cancer.
Jennifer M Hulett, Demetrius A Abshire, Jane M Armer and 2 others
PMID 32195710WHAT IT FOUND
Rural breast cancer survivors had higher evening inflammation markers than urban survivors, but most health perception scores and other stress hormone patterns showed no significant differences between the two groups.
Key findings
01Evening salivary IL-6 was significantly higher in rural survivors compared to urban survivors, though this finding rests on a small subset of participants.
02There were no statistically significant differences in perceived physical or mental health scores, nor in daily cortisol or alpha-amylase patterns, between rural and urban women.
03Associations between health perceptions and biomarkers varied by residence: rural women linked better physical function to higher inflammation, while urban women linked better vitality to lower inflammation.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
The study was underpowered, with only 41 participants total and fewer available samples for IL-6 analysis, which limits the reliability of the findings. Participants were predominantly older (mean age 66) and white, from a single Midwestern state, so results may not apply to younger, minority, or geographically diverse populations. The cross-sectional design cannot determine if residence causes the observed biomarker differences or if other unmeasured factors (like environmental exposures or stress) are responsible. Many participants could not recall their cancer stage, and the study did not measure perceived stress, which may have influenced the relationship between biomarkers and health perceptions.
Declared interests
The authors declared no conflicts of interest. The study was supported by the National Institute of Nursing Research (NINR) and the National Cancer Institute (NCI).
The easy way to misread this
Do not conclude that rural breast cancer survivors have worse health outcomes or higher stress levels based on this paper. The primary health perception scores and most biomarker patterns showed no significant differences between rural and urban women. The significant finding regarding evening IL-6 was based on a small subset of participants and requires confirmation in larger studies.