How different measures of cold weather affect chronic obstructive pulmonary disease (COPD) hospital admissions in London

Marno, Penny; Bryden, Clare; Bird, William; Watkin, H. A.

doi:10.1183/09059180.00010126

Cited by 22 publications

(23 citation statements)

References 4 publications

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“…9 Data presented to date show that this method is effective in predicting periods of increased COPD exacerbations and hospital admissions. 9,11 The COPD Healthy Outlook 1 service uses this model to predict periods of increased COPD exacerbations and hospital admissions joined together with interactive telephone alerts associated with a model of patients education to reduce exacerbation rates and hospital admissions. 10 Our study shows that this model of health forecasting had no effect on reducing hospital admissions in patients with mild-to-moderate COPD.…”

Section: Discussionmentioning

confidence: 99%

“…However, Wind-chill had the strongest correlation accounting for 20% variation in COPD admissions with 7 days lag. 9 Therefore, COPD health forecasting developed by Met Office, UK, was based on the combined effect of seasonality, cold weather, and the predominant weather type in a given winter, together with health surveillance data. 9 Data presented to date show that this method is effective in predicting periods of increased COPD exacerbations and hospital admissions.…”

Section: Discussionmentioning

confidence: 99%

“…9 Therefore, COPD health forecasting developed by Met Office, UK, was based on the combined effect of seasonality, cold weather, and the predominant weather type in a given winter, together with health surveillance data. 9 Data presented to date show that this method is effective in predicting periods of increased COPD exacerbations and hospital admissions. 9,11 The COPD Healthy Outlook 1 service uses this model to predict periods of increased COPD exacerbations and hospital admissions joined together with interactive telephone alerts associated with a model of patients education to reduce exacerbation rates and hospital admissions.…”

Section: Discussionmentioning

confidence: 99%

“…The full details of the Healthy Outlook 1 have been previously described and can be found on the Met Office's web address. [9][10][11] All patients on the COPD Quality Outcome Framework (QOF) registers from 3 primary care practices in Salford, UK, with mild-to-moderate airflow obstruction, as defined by the British Thoracic Society (BTS), 12 were invited through their GPs to participate. All those who consented to participate received the full information pack from the Met Office.…”

Section: Methodsmentioning

confidence: 99%

“…7,8 It has been hypothesised that if we are able to predict changes in certain environmental factors including temperature, we might be able to reduce the risk of COPD exacerbations by prompting the correct action in an anticipatory care model. 9 This concept is called Health Forecasting (HF). This paper describes the effect of COPD HF on unscheduled COPD admissions and on health care utilisation (HCU) in a UK district with high COPD prevalence.…”

Section: Introductionmentioning

confidence: 99%

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The effect of COPD health forecasting on hospitalisation and health care utilisation in patients with mild-to-moderate COPD

et al. 2011

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Exacerbations are a major cause of morbidity and mortality in patients with chronic obstructive pulmonary disease (COPD) as well as having a large impact on health care utilisation (HCU). They are more frequent during periods of cold weather with a corresponding increase in hospital admissions. It has been hypothesised that COPD exacerbations and admissions can be reduced by predicting periods of cold weather coupled with patients' alerts and education. Healthy Outlook 1 service provided by the Meteorological Office, UK, was used in patients with mild-to-moderate COPD who consented to participate from three primary care practices. Outcome measures included data relating to hospital admissions for acute exacerbations as well as HCU for these patients during the intervention period (1 Nov 2008À31 Mar 2009) and compared for the same patients and same period 12 months earlier (1 Nov 2007À31 Mar 2008. A cost analysis comparing treatment cost per patient for the two periods was also conducted. A total of 157 (34% of target COPD population) patients took part in the project, with five weather alerts generated (first alert reached 150 patients; second reached 146; third reached 138 patients; fourth reached 137 patients; and the fifth reached 125 patients) during the intervention period. There was a non-statistically-significant increase in hospital admissions per patient (0.07À0.076; p ¼ 0.83). The number of general practice visits per patient dropped from 4.9 to 3.8 (p ¼ 0.001), with drop in average number of visits to patients by out-of-hours services from 0.52À0.14 (p ¼ 0.013). The average number of home consultations provided by general practice increased from 0.05 to 0.92 (p ¼ 0.001). Cost per patient increased by an average of £142 (95% CI -£128 to £412). This anticipatory care model was not associated with reduction in admissions from COPD exacerbations. Further research is required to fully understand its role in the management of patients with COPD.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The effect of COPD health forecasting on hospitalisation and health care utilisation in patients with mild-to-moderate COPD

et al. 2011

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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

et al. 2012

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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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Synergistic effects of temperature and humidity on the symptoms of COPD patients

Chen

Geng

et al. 2017

Int J Biometeorol

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This panel study investigates how temperature, humidity, and their interaction affect chronic obstructive pulmonary disease (COPD) patients' self-reported symptoms. One hundred and six COPD patients from Shanghai, China, were enrolled, and age, smoking status, St. George Respiratory Questionnaire (SGRQ) score, and lung function index were recorded at baseline. The participants were asked to record their indoor temperature, humidity, and symptoms on diary cards between January 2011 and June 2012. Altogether, 82 patients finished the study. There was a significant interactive effect between temperature and humidity (p < 0.0001) on COPD patients. When the indoor humidity was low, moderate, and high, the indoor temperature ORs were 0.969 (95% CI 0.922 to 1.017), 0.977 (0.962 to 0.999), and 0.920 (95% CI 0.908 to 0.933), respectively. Low temperature was a risk factor for COPD patients, and high humidity enhanced its risk on COPD. The indoor temperature should be kept at least on average at 18.2 °C, while the humidity should be less than 70%. This study demonstrates that temperature and humidity were associated with COPD patients' symptoms, and high humidity would enhance the risk of COPD due to low temperature.

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How different measures of cold weather affect chronic obstructive pulmonary disease (COPD) hospital admissions in London

Cited by 22 publications

References 4 publications

The effect of COPD health forecasting on hospitalisation and health care utilisation in patients with mild-to-moderate COPD

The effect of COPD health forecasting on hospitalisation and health care utilisation in patients with mild-to-moderate COPD

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

Synergistic effects of temperature and humidity on the symptoms of COPD patients

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