Actigraphy Analysis of Sleep Associates with Salivary IL-6 Concentration in Institutionalized Older Individuals
Valle et al.
The finding, in our words
In 61 nursing home residents, actigraphy-derived sleep parameters showed significant correlations with salivary IL-6 concentrations. These associations between inflammatory markers and objective sleep measures support the use of combined wearable monitoring and saliva microsampling to assess sleep disturbances in institutionalised older adults.
A paraphrase to the Library’s standard, never the abstract. The source is one link away and is always the authority.
The study demonstrated that longitudinal remote monitoring using wearable sleep electroencephalography, actigraphy, and self-collected saliva samples is feasible in older adults with mild cognitive impairment or dementia, with high retention and data completeness rates over eight weeks.
The study found that a heat-treated probiotic formulation did not significantly improve sleep scores in the full cohort but did modulate endocrine markers, showing up-regulated nocturnal melatonin and improved daytime orexin levels, with a tendency toward reduced nocturnal salivary cortisol. Benefits were more pronounced in participants with higher baseline insomnia severity, suggesting the intervention may be most useful for symptomatic populations.
This review establishes that microsampling across blood, saliva, urine and stool matrices offers validated workflows and regulatory recognition for human biomonitoring comparable to conventional methods. It finds that these decentralised approaches enhance participant acceptability and enable screening in remote or low-resource settings.
This narrative review finds that saliva is best suited to repeated neuroendocrine and metabolic measurements during exercise, sweat is most mature for electrolyte and sweat-rate monitoring with wearable compatibility, and exhaled breath offers access to volatile metabolism but remains instrumentally demanding. Each matrix requires matching to a defined clinical or exercise question with matrix-specific validation before translational use.