The Risk Factors and Characteristics of COPD Among Nonsmokers in Korea: An Analysis of KNHANES IV and V.

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The Risk Factors and Characteristics of COPD Among Nonsmokers in Korea: An Analysis of KNHANES IV and V.

Lung. 2016 Apr 1;

Authors: Lee SH, Hwang ED, Lim JE, Moon S, Kang YA, Jung JY, Park MS, Kim SK, Chang J, Kim YS, Kim SY

Abstract
PURPOSE: Chronic obstructive pulmonary disease (COPD) is increasing in prevalence and mortality. This study evaluated the prevalence, risk factors, characteristics, and health-related quality of life (HRQoL) of COPD among nonsmokers in Korea.
METHODS: This was a population-based cross-sectional study using data obtained from the Fourth and Fifth Korean National Health and Nutrition Examination Survey, which was conducted from 2007 to 2011.
RESULTS: A total of 15,063 participants completely answered the questionnaire and performed the spirometry. Among them, 59.6 % were nonsmokers and 40.4 % were smokers. The prevalence of nonsmoker COPD was 7.1 %. On multivariate analysis, age ?65 years (OR, 2.93; 95 % CI, 2.44-3.51), male sex (OR, 2.98; 95 % CI, 2.40-3.71), living in rural area (OR, 1.26; 95 % CI, 1.05-1.51), lower body mass index (BMI) (<18.5 kg/m(2)) (OR, 3.00; 95 % CI, 1.78-5.01), self-reported asthma (OR, 2.72; 95 % CI, 2.05-3.60), and self-reported tuberculosis (OR, 4.73; 95 % CI, 3.63-6.17) showed a significantly higher risk of nonsmoker COPD. Analysis of nonsmoker and smoker COPD revealed that there are more females in nonsmoker COPD patients (73.9 vs. 6.9 %, P < 0.001). Nonsmoker COPD patients presented with impaired mobility, pain/discomfort, and anxiety/depression functions as well as a lower mean EuroQol Five-Dimension Questionnaire utility score, which showed HRQoL.
CONCLUSIONS: The burden of nonsmoker COPD was considerable. Older age, male sex, lower BMI, self-reported asthma, and self-reported tuberculosis were risk factors for nonsmoker COPD and there were differences between nonsmoker and smoker COPD in terms of sex, comorbidities, and HRQoL.

PMID: 27038474 [PubMed – as supplied by publisher]

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Outdoor temperature changes and emergency department visits for asthma in Seoul, Korea: A time-series study.

Outdoor temperature changes and emergency department visits for asthma in Seoul, Korea: A time-series study.

Environ Res. 2014 Sep 24;135C:15-20

Authors: Kim J, Lim Y, Kim H

Abstract
BACKGROUND: Extreme temperatures and temperature changes are known indicators of climate change, and large temperature variations for several consecutive days may affect human health such as exacerbating respiratory symptoms. The objective of this study was to determine the association between outdoor temperature change and asthma-related emergency department visits. In particular, this study examined seasonality and identified susceptible populations, such as the elderly.
METHODS: The health data for asthma-related emergency department visits were collected from July 1, 2007, to December 31, 2010 in Seoul, Korea, through the National Emergency Department Information System of the National Emergency Medical Center and we defined temperature change as the absolute difference of mean temperature between the current day and the previous day. We applied generalized linear models with an allowance of over-dispersion for quantifying the estimated effects of temperature change on asthma-related emergency department visits, adjusting for meteorological conditions, air pollution, and time trend.
RESULTS: In general, temperature change was adversely associated with asthma-related emergency department visits, with a 1-unit increase of temperature change associated with a 3.5% (95% CI 0.7, 6.4%) increase in emergency department visits. In addition, seasonal variation after adjusting for mean temperature and diurnal temperature range had an adverse effect in spring, summer, and fall and a protective effect in winter. Patients aged ?65 years experienced the most prominent effect during the fall, with a 17.9% (95% CI 4.1, 33.6%) increase in emergency department visits per 1-unit increase of temperature change, whereas the other seasons showed no statistically significant association.
CONCLUSIONS: Along with diurnal temperature range, temperature change may be an alternative indicator of climate change. Temperature change variables are well-known and easy to communicate with the public relative to the health effects of outdoor temperature fluctuations.

PMID: 25261859 [PubMed – as supplied by publisher]

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Important Asthma Facts – 2.4 million asthma patients in Korea

The Korea Times is reporting that people with asthma are quite vulnerable to cold weather, allergies and dust. In low temperatures and dusty environments asthma suffers cough more often and breathing problems.

According to the definition provided by the U.S. National Institutes of Health, asthma is a chronic lung disease that inflames and narrows the airways. Asthma causes recurring periods of wheezing (a whistling sound made when you breathe), chest tightness, shortness of breath, and coughing. The coughing often occurs at night or early in the morning.

As of the latest report in 2007, there are more than 2.4 million asthma patients in Korea.

If you have been kept awake during the night because of excessive coughing or shortness of breath; or have always felt short of breath after exercise; suffered from colds or flu for more than three weeks; have had breathing problems after taking cough drops or hypertension pills or have eczema, you should consult your doctor because you might have asthma.

Dr. Shin Jong-wook of Chung-Ang University Hospital says people with incorrect information about the disease may make symptoms worse. He mentioned several misconceptions people have about asthma.

1. Jogging and hiking are good for asthma: Wrong

Asthma patients with breathing difficulties are mistaken when they believe that running, cycling or hiking will help their lung capacity.

Actually, early morning exercise could worsen their symptoms. The cold air gets into the lungs and stimulates the respiratory organs.

It is much better to take a walk or stretch. Avoid going to “dry” areas.

Swimming is recommended. Immersed in water and moisture, this exercise is much safer. Although right after swimming your body temperature falls, so take precautions as not to worsen your symptoms.

2. Smoking is bad but drinking is okay: Wrong

Nowadays everyone knows that drinking is not good for your health. However, many asthmatics underestimate the high risks of drinking alcohol, which contains sulfites that causes bronchial tubes to shrink.

Sulfites can also be found in dried fruits, juice, beer, potatoes and shrimp.

3. Only children suffer from asthma: wrong

It is true that asthma is more commonly detected among children and teenagers. But according to a report by the Ministry of Health and Welfare, the prevalence rate among people over 50 years old is now higher than average: the overall prevalence rate is 3 percent. It seems that the disease first appears in childhood then gets better but relapses in adulthood.

Therefore, those who had asthma in the past should always check their condition. Elderly people should take extra care because asthma could lead to chronic obstructive pulmonary disease.

4. Refrain from using drugs with steroids: wrong

Doctors prescribe drugs that contain steroids to expand the shrunken bronchial tubes and fix possible inflammation. However, steroids are known for their negative side effects such as hypertension, weight gain, osteoporosis and stomach ulcers among others, which deter many patients from taking them.

However, commonly prescribed steroids in artificial inhalers are only used for the bronchial tubes and one does not have to worry too much about the side effects.

5. Asthma is a serious condition: correct

The general public may disregard the seriousness of asthma but it is in fact a deadly disease. Experts grade it into four stages and the fourth level can cause death. Those who are diagnosed with asthma shouldn’t be overly concerned, but at the same time should remain alert to their sensitive condition.
bjs@koreatimes.co.kr