The association of wildfire smoke with respiratory...

Research studies on wood smoke and other air pollution.

The association of wildfire smoke with respiratory...

Postby Wilberforce » Mon Jun 06, 2016 5:29 pm

http://ehjournal.biomedcentral.com/arti ... 016-0146-8
The association of wildfire smoke with respiratory and cardiovascular emergency department visits in Colorado in 2012: a case crossover study

Breanna L. AlmanEmail author, Gabriele Pfister, Hua Hao, Jennifer Stowell, Xuefei Hu, Yang Liu and Matthew J. Strickland

Environmental Health201615:64

DOI: 10.1186/s12940-016-0146-8

Abstract

Background
In 2012, Colorado experienced one of its worst wildfire seasons of the past decade. The goal of this study was to investigate the relationship of local PM2.5 levels, modeled using the Weather Research and Forecasting Model with Chemistry, with emergency department visits and acute hospitalizations for respiratory and cardiovascular outcomes during the 2012 Colorado wildfires.

Methods
Conditional logistic regression was used to assess the relationship between both continuous and categorical PM2.5 and emergency department visits during the wildfire period, from June 5th to July 6th 2012.

Results
For respiratory outcomes, we observed positive relationships between lag 0 PM2.5 and asthma/wheeze (1 h max OR 1.01, 95 % CI (1.00, 1.01) per 10 µg/m3; 24 h mean OR 1.04 95 % CI (1.02, 1.06) per 5 µg/m3), and COPD (1 h max OR 1.01 95 % CI (1.00, 1.02) per 10 µg/m3; 24 h mean OR 1.05 95 % CI (1.02, 1.08) per 5 µg/m3). These associations were also positive for 2-day and 3-day moving average lag periods. When PM2.5 was modeled as a categorical variable, bronchitis also showed elevated effect estimates over the referent groups for lag 0 24 h average concentration. Cardiovascular results were consistent with no association.

Conclusions
We observed positive associations between PM2.5 from wildfire and respiratory diseases, supporting evidence from previous research that wildfire PM2.5 is an important source for adverse respiratory health outcomes.

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http://www.ncbi.nlm.nih.gov/pubmed/27240193
Antimüllerian hormone (AMH) in relation to tobacco and marijuana use and sources of indoor heating/cooking.
White AJ1, Sandler DP2, D'Aloisio AA3, Stanczyk F4, Whitworth KW5, Baird DD2, Nichols HB6.

Abstract
OBJECTIVE:
To evaluate exposure to tobacco, marijuana, and indoor heating/cooking sources in relation to antimüllerian hormone (AMH) levels.

DESIGN:
Cross-sectional analysis in a sample of premenopausal women (n = 913) enrolled in the Sister Study cohort (n = 50,884).

SETTING:
Not applicable.

PATIENT(S):
Women, ages 35-54 at time of enrollment, with an archived serum sample and at least one intact ovary and classified as premenopausal.

INTERVENTION(S):
Not applicable.

MAIN OUTCOME MEASURE(S):
Serum AMH (ng/mL) levels ascertained by ultrasensitive ELISA assay.

RESULT(S):
Lower AMH levels were associated with sources of indoor heating, including burning wood (-36.0%; 95% confidence interval [CI], -55.7%, -7.8%) or artificial fire logs (-45.8%; 95% CI, -67.2%, -10.4%) at least 10 times/year in a residential indoor stove/fireplace. Lower AMH levels were also observed in women who were current smokers of =20 cigarettes/day relative to nonsmokers (-56.2%; 95% CI, -80.3%, -2.8%) and in women with 10+ years of adult environmental tobacco smoke (ETS) exposure (-31.3%; 95% CI, -51.3%, -3.1%), but no associations were observed for marijuana use.

CONCLUSION(S):
We confirmed previously reported findings of lower AMH levels in current heavy smokers and also found associations for long-term ETS exposure and indoor burning of wood or artificial fire logs. These findings suggest that combustion by-products from common exposures can have toxic effects on the human ovary.


Published by Elsevier Inc.
• The Surgeon General has determined that there is no safe level of exposure to ambient smoke!

• If you smell even a subtle odor of smoke, you are being exposed to poisonous and carcinogenic chemical compounds!

• Even a brief exposure to smoke raises blood pressure, (no matter what your state of health) and can cause blood clotting, stroke, or heart attack in vulnerable people. Even children experience elevated blood pressure when exposed to smoke!

• Since smoke drastically weakens the lungs' immune system, avoiding smoke is one of the best ways to prevent colds, flu, bronchitis, or risk of an even more serious respiratory illness, such as pneumonia or tuberculosis! Does your child have the flu? Chances are they have been exposed to ambient smoke!
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