Observational studyInternational journal of environmental research and public health2023
Effects of Plant-Emitted Monoterpenes on Anxiety Symptoms: A Propensity-Matched Observational Cohort Study.
Observational study in International journal of environmental research and public health, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
9 citing papers in PubMed, 26 citations in OpenAlex.
- Smelling Wellness: Associations Between Botanic Garden Scentscapes and Human Health Gains.International journal of environmental research and public health · 2026Trial
- Twenty-four-hour post-anaesthetic behavioural effects of menthol and thymol compared to conventional anaesthetics in zebrafish.Fish physiology and biochemistry · 2026Article
- EAACI Guidelines on the Importance of Green Space in Urban Environments for Allergy and Asthma Prevention.Allergy · 2026Review
- Composition of Diagnostic Assessment Sheet Items for Developing a Personalized Forest Therapy Program for Patients with Depression: Application of the Delphi Technique.Healthcare (Basel, Switzerland) · 2026Article
- Terpene content in the air of younger and older forests in southeastern Poland: implications for forest therapy.Scientific reports · 2025Article
- Therapist-Guided Versus Self-Guided Forest Immersion: Comparative Efficacy on Short-Term Mental Health and Economic Value.Behavioral sciences (Basel, Switzerland) · 2025Article
- Assessing the Anxiolytic and Relaxation Effects ofFrontiers in psychology · 2024Article
- Demographic, Psychosocial, and Lifestyle-Related Characteristics of Forest Therapy Participants in Italy: A Multicenter Cross-Sectional Survey.Healthcare (Basel, Switzerland) · 2023Article
- From biodiversity to nature deficiency in human health and disease.Porto biomedical journalReview
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Immersive experiences in green areas, particularly in forests, have long been known to produce beneficial effects for human health. However, the exact determinants and mechanisms leading to healthy outcomes remain to be elucidated. The purpose of this observational cohort study was to investigate whether inhaling plant-emitted biogenic volatile compounds, namely monoterpenes (MTs), can produce specific effects on anxiety symptoms. Data from 505 subjects participating in 39 structured forest therapy sessions at different Italian sites were collected. The air concentration of monoterpenes was measured at each site. STAI state questionnaires were administered before and after the sessions as a measure of anxiety. A propensity score matching analysis was then performed, considering an above-average exposure to inhalable air MTs as the treatment. The estimated effect was -1.28 STAI-S points (95% C.I. -2.51 to -0.06,
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.