ArticleInternational journal of biometeorology2013
Use of "Cold Spell" indices to quantify excess chronic obstructive pulmonary disease (COPD) morbidity during winter (November to March 2000-2007): case study in Porto.
Article in International journal of biometeorology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.
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Who cites it
12 citing papers in PubMed, 1 synthesis or guideline pooled it, 49 citations in OpenAlex.
- Global Association of Cold Spells and Adverse Health Effects: A Systematic Review and Meta-Analysis.Environmental health perspectives · 2016Pooled it
- Impact of a Heating Voucher on Health Outcomes in COPD Patients: A Randomised Controlled Trial.International journal of chronic obstructive pulmonary disease · 2025Trial
- Article
- Paradoxical home temperatures during cold weather: a proof-of-concept study.International journal of biometeorology · 2020Article
- A comparison of the effect of weather and climate on emergency department visitation in Roanoke and Charlottesville, Virginia.Environmental research · 2020Article
- Monthly-Term Associations Between Air Pollutants and Respiratory Morbidity in South Brazil 2013-2016: A Multi-City, Time-Series Analysis.International journal of environmental research and public health · 2019Article
- Use of primary care data to predict those most vulnerable to cold weather: a case-crossover analysis.The British journal of general practice : the journal of the Royal College of General Practitioners · 2018Article
- The influence of the winter North Atlantic Oscillation index on hospital admissions through diseases of the circulatory system in Lisbon, Portugal.International journal of biometeorology · 2017Article
- The impact of cold spells on mortality and effect modification by cold spell characteristics.Scientific reports · 2016Article
- Effect of cold spells and their modifiers on cardiovascular disease events: Evidence from two prospective studies.International journal of cardiology · 2016Article
- Temporal relationship between hospital admissions for pneumonia and weather conditions in Shanghai, China: a time-series analysis.BMJ open · 2014Article
- The causes and consequences of seasonal variation in COPD exacerbations.International journal of chronic obstructive pulmonary disease · 2014Review
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The aim of this study was to examine the relationship between the occurrence of cold episodes and excess hospital admissions for chronic obstructive pulmonary disease (COPD) in Porto, Portugal, in order to further understand the effects of cold weather on health in milder climates. Excess COPD winter morbidity was calculated from admissions for November to March (2000-2007) in the Greater Porto Metropolitan Area (GPMA). Cold spells were identified using several indices (Díaz, World Meteorological Organization, Cold Spell Duration Index, Australian Index and Ondas' Project Index) for the same period. Excess admissions in the periods before and after the occurrence of cold spells were calculated and related to the cold spells identified. The COPD seasonal variation admission coefficient (CVSA) showed excess winter admissions of 59 %, relative to other months. The effect of cold spell on the aggravation of COPD occurs with a lag of at least 2 weeks and differs according to the index used. This study indicates the important role of the persistence of cold periods of at least 2 weeks duration in the increase in COPD admissions. The persistence of moderate temperatures (Tmin ≤5 °C) for a week can be more significant for increasing COPD admissions than very low temperatures (Tmin ≤ 1.6 °C) for just a few days. The Ondas projects' index provides the most accurate detection of the negative impacts of cold persistency on health, while the Diaz index is better at evaluating the consequences of short extreme cold events.
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