Observational studyInternational journal of chronic obstructive pulmonary disease
Prevalence and Characteristics of Individuals with Preserved Ratio Impaired Spirometry (PRISm) and/or Impaired Lung Function in Japan: The OCEAN Study.
Observational study in International journal of chronic obstructive pulmonary disease. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 3 of them syntheses that pooled it.
What it found
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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.
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Who cites it
25 citing papers in PubMed, 3 syntheses or guidelines pooled it, 49 citations in OpenAlex.
- Prevalence of preserved ratio impaired spirometry and restrictive spirometry pattern in the general population: a systematic review and multi-level meta-analysis of studies from multiple countries.Journal of global health · 2026Pooled it
- Pooled it
- Association of preserved ratio impaired spirometry with mortality and cardiovascular diseases: a systematic review and meta-analysis.Systematic reviews · 2024Pooled it
- Asthma outcomes in adults with preserved ratio impaired spirometry: a cohort study.ERJ open research · 2026Article
- Dietary quality, insulin resistance, and preserved ratio impaired spirometry in postmenopausal women: a cross-sectional study with exploratory mediation analysis.Frontiers in nutrition · 2026Article
- Article
- Clinical characteristics and outcomes associated with preserved ratio impaired spirometry (PRISm) in Saudi Arabia.Frontiers in medicine · 2026Article
- Preserved Ratio Impaired Spirometry (PRISm) from an Epidemiological Perspective.Journal of clinical medicine · 2025Article
- Associations of preserved ratio impaired spirometry with cardiometabolic comorbidities: a systematic review and meta-analysis.ERJ open research · 2025Article
- Article
- Preserved ratio impaired spirometry: clinical, imaging and artificial intelligence perspective.Journal of thoracic disease · 2025Review
- Prevalence, Risk Factors of Preserved Ratio Impaired Spirometry in adult in plateau: A Cross-Sectional Study.PloS one · 2025Article
- Impaired lung function and lung cancer risk in 461 183 healthy individuals: a cohort study.BMJ open respiratory research · 2024Article
- Preserved Ratio Impaired Spirometry (PRISm): A Global Epidemiological Overview, Radiographic Characteristics, Comorbid Associations, and Differentiation from Chronic Obstructive Pulmonary Disease.International journal of chronic obstructive pulmonary disease · 2024Review
- The many faces of COPD in real life: a longitudinal analysis of the NOVELTY cohort.ERJ open research · 2024Article
- Impact of preserved ratio impaired spirometry on coronary artery calcium score progression: a longitudinal cohort study.ERJ open research · 2024Article
- Article
- Associations Between Physical Activity and Preserved Ratio Impaired Spirometry: A Cross-Sectional NHANES Study.International journal of chronic obstructive pulmonary disease · 2024Article
- Preserved Ratio Impaired Spirometry in US Primary Care Patients Diagnosed with Chronic Obstructive Pulmonary Disease.Pragmatic and observational research · 2024Article
- Preserved ratio impaired spirometry with or without restrictive spirometric abnormality.Scientific reports · 2023Article
Corrections and comments
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Authors and funding
14 authors at 5 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeMany individuals with obstructive airway disease (OAD), including chronic obstructive pulmonary disease (COPD) and asthma, remain undiagnosed, despite the potential for reducing disease burden through early detection and treatment. OCEAN aimed to determine the prevalence of, and characteristics associated with, impaired lung function in a Japanese population, with the goal of improving strategies for early OAD detection.
methodsOCEAN was an observational, cross-sectional study in sequentially recruited Japanese individuals ≥40 years of age undergoing routine health examinations. Participants completed screening questionnaires and spirometry testing. Airflow limitation was defined as forced expiratory volume in 1 second/forced vital capacity (FEV
resultsOverall, 2518 individuals were included; 79% were <60 years of age (mean 52.0 years). Airflow limitation and PRISm were observed in 52 (2.1%) and 420 (16.7%) participants, respectively. FEV
conclusionA significant proportion of Japanese individuals <60 years of age attending their annual health examination had impaired lung function (airflow limitation and PRISm); prevalence was highest among current smokers. These findings support screening of current or former smokers ≥40 years of age using patient-reported questionnaires to inform the need for spirometry to confirm an OAD diagnosis.
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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.