Different duration of high-altitude pre-exposure associated with the incidence of acute mountain sickness on Jade Mountain
Abstract Objective The objective of this study is to determine the association between the duration of high-altitude (> 3000 m) pre-exposure and acute mountain sickness (AMS) incidence. Methods A prospective observational study was conducted on 2 random days each month from April 2007 to March 20...
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Veröffentlicht in: | The American journal of emergency medicine 2013-07, Vol.31 (7), p.1113-1117 |
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creator | Weng, Yi-Ming, MD Chiu, Yu-Hui, MD Lynn, Jiun-Jen, MD Li, Wen-Cheng, MD Wang, Shih-Hao, MD Kao, Wei-Fong, MD Hsu, Tai-Yi, MD Chiu, Te-Fa, MD Lin, Yu-Jr Chan, Chang-Wei, MD |
description | Abstract Objective The objective of this study is to determine the association between the duration of high-altitude (> 3000 m) pre-exposure and acute mountain sickness (AMS) incidence. Methods A prospective observational study was conducted on 2 random days each month from April 2007 to March 2008 at Paiyun Lodge (3402 m), Jade Mountain, Taiwan. Demographic data, prior AMS history, symptoms, and scores and the days and times of high-altitude pre-exposure within the preceding 2 months were obtained from lowland (< 1500 m) trekkers. Results Totally, 1010 questionnaires were analyzed; 106, 76, and 828 trekkers had pre-exposure lasting at least 3 days (group 1), less than 3 days (group 2), and 0 days (group 3), respectively. Acute mountain sickness incidence was significantly higher in groups 2 and 3 than in group 1 (21.70%, 35.53%, 37.08%, respectively; P = .008). Logistic regression analysis indicated a significantly lower AMS risk in group 1 (group 1, P = .004; odds ratio [OR], 0.479; 95% confidence interval [CI], 0.290-0.791; group 2, P = .226; OR, 0.725; 95% CI, 0.430-1.221). In group 1, 28 and 78 trekkers had single and intermittent multiple pre-exposure, respectively. There was no difference in the incidence or severity of AMS symptoms between single and intermittent multiple pre-exposure (AMS, P = .838; headache, P = .891; dizziness or lightheadedness, P = .414; fatigue and/or weakness, P = .957; gastrointestinal symptoms, P = .257; difficulty sleeping, P = .804; AMS score, P = .796). Conclusions High-altitude pre-exposure lasting at least 3 days within the preceding 2 months was associated with a significant lower AMS incidence during a subsequent ascent among Jade Mountain trekkers. |
doi_str_mv | 10.1016/j.ajem.2013.03.028 |
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Methods A prospective observational study was conducted on 2 random days each month from April 2007 to March 2008 at Paiyun Lodge (3402 m), Jade Mountain, Taiwan. Demographic data, prior AMS history, symptoms, and scores and the days and times of high-altitude pre-exposure within the preceding 2 months were obtained from lowland (< 1500 m) trekkers. Results Totally, 1010 questionnaires were analyzed; 106, 76, and 828 trekkers had pre-exposure lasting at least 3 days (group 1), less than 3 days (group 2), and 0 days (group 3), respectively. Acute mountain sickness incidence was significantly higher in groups 2 and 3 than in group 1 (21.70%, 35.53%, 37.08%, respectively; P = .008). Logistic regression analysis indicated a significantly lower AMS risk in group 1 (group 1, P = .004; odds ratio [OR], 0.479; 95% confidence interval [CI], 0.290-0.791; group 2, P = .226; OR, 0.725; 95% CI, 0.430-1.221). In group 1, 28 and 78 trekkers had single and intermittent multiple pre-exposure, respectively. There was no difference in the incidence or severity of AMS symptoms between single and intermittent multiple pre-exposure (AMS, P = .838; headache, P = .891; dizziness or lightheadedness, P = .414; fatigue and/or weakness, P = .957; gastrointestinal symptoms, P = .257; difficulty sleeping, P = .804; AMS score, P = .796). Conclusions High-altitude pre-exposure lasting at least 3 days within the preceding 2 months was associated with a significant lower AMS incidence during a subsequent ascent among Jade Mountain trekkers.</description><identifier>ISSN: 0735-6757</identifier><identifier>EISSN: 1532-8171</identifier><identifier>DOI: 10.1016/j.ajem.2013.03.028</identifier><identifier>PMID: 23688567</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>Acclimatization ; Acute Disease ; Adult ; Age ; Altitude ; Altitude Sickness - epidemiology ; Altitude Sickness - etiology ; Altitude Sickness - prevention & control ; Body mass index ; Climbing ; Emergency ; Emergency medical care ; Evacuations & rescues ; Exposure ; Female ; Humans ; Incidence ; Logistic Models ; Male ; Middle Aged ; Mountaineering ; National parks ; Observational studies ; Prospective Studies ; Questionnaires ; Rain ; Regression analysis ; Risk Factors ; Severity of Illness Index ; Surveys and Questionnaires ; Taiwan ; Time Factors</subject><ispartof>The American journal of emergency medicine, 2013-07, Vol.31 (7), p.1113-1117</ispartof><rights>Elsevier Inc.</rights><rights>2013 Elsevier Inc.</rights><rights>Copyright © 2013 Elsevier Inc. All rights reserved.</rights><rights>Copyright Elsevier Limited 2013</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c472t-a6e3c05e09a0dc4a180dd705c04dc7a695b506953d4f25965ebfcbd6c43d15be3</citedby><cites>FETCH-LOGICAL-c472t-a6e3c05e09a0dc4a180dd705c04dc7a695b506953d4f25965ebfcbd6c43d15be3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.proquest.com/docview/1398480566?pq-origsite=primo$$EHTML$$P50$$Gproquest$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,64361,64363,64365,65309,72215</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23688567$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Weng, Yi-Ming, MD</creatorcontrib><creatorcontrib>Chiu, Yu-Hui, MD</creatorcontrib><creatorcontrib>Lynn, Jiun-Jen, MD</creatorcontrib><creatorcontrib>Li, Wen-Cheng, MD</creatorcontrib><creatorcontrib>Wang, Shih-Hao, MD</creatorcontrib><creatorcontrib>Kao, Wei-Fong, MD</creatorcontrib><creatorcontrib>Hsu, Tai-Yi, MD</creatorcontrib><creatorcontrib>Chiu, Te-Fa, MD</creatorcontrib><creatorcontrib>Lin, Yu-Jr</creatorcontrib><creatorcontrib>Chan, Chang-Wei, MD</creatorcontrib><title>Different duration of high-altitude pre-exposure associated with the incidence of acute mountain sickness on Jade Mountain</title><title>The American journal of emergency medicine</title><addtitle>Am J Emerg Med</addtitle><description>Abstract Objective The objective of this study is to determine the association between the duration of high-altitude (> 3000 m) pre-exposure and acute mountain sickness (AMS) incidence. Methods A prospective observational study was conducted on 2 random days each month from April 2007 to March 2008 at Paiyun Lodge (3402 m), Jade Mountain, Taiwan. Demographic data, prior AMS history, symptoms, and scores and the days and times of high-altitude pre-exposure within the preceding 2 months were obtained from lowland (< 1500 m) trekkers. Results Totally, 1010 questionnaires were analyzed; 106, 76, and 828 trekkers had pre-exposure lasting at least 3 days (group 1), less than 3 days (group 2), and 0 days (group 3), respectively. Acute mountain sickness incidence was significantly higher in groups 2 and 3 than in group 1 (21.70%, 35.53%, 37.08%, respectively; P = .008). Logistic regression analysis indicated a significantly lower AMS risk in group 1 (group 1, P = .004; odds ratio [OR], 0.479; 95% confidence interval [CI], 0.290-0.791; group 2, P = .226; OR, 0.725; 95% CI, 0.430-1.221). In group 1, 28 and 78 trekkers had single and intermittent multiple pre-exposure, respectively. There was no difference in the incidence or severity of AMS symptoms between single and intermittent multiple pre-exposure (AMS, P = .838; headache, P = .891; dizziness or lightheadedness, P = .414; fatigue and/or weakness, P = .957; gastrointestinal symptoms, P = .257; difficulty sleeping, P = .804; AMS score, P = .796). Conclusions High-altitude pre-exposure lasting at least 3 days within the preceding 2 months was associated with a significant lower AMS incidence during a subsequent ascent among Jade Mountain trekkers.</description><subject>Acclimatization</subject><subject>Acute Disease</subject><subject>Adult</subject><subject>Age</subject><subject>Altitude</subject><subject>Altitude Sickness - epidemiology</subject><subject>Altitude Sickness - etiology</subject><subject>Altitude Sickness - prevention & control</subject><subject>Body mass index</subject><subject>Climbing</subject><subject>Emergency</subject><subject>Emergency medical care</subject><subject>Evacuations & rescues</subject><subject>Exposure</subject><subject>Female</subject><subject>Humans</subject><subject>Incidence</subject><subject>Logistic Models</subject><subject>Male</subject><subject>Middle Aged</subject><subject>Mountaineering</subject><subject>National parks</subject><subject>Observational studies</subject><subject>Prospective Studies</subject><subject>Questionnaires</subject><subject>Rain</subject><subject>Regression analysis</subject><subject>Risk Factors</subject><subject>Severity of Illness Index</subject><subject>Surveys and Questionnaires</subject><subject>Taiwan</subject><subject>Time Factors</subject><issn>0735-6757</issn><issn>1532-8171</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNqFkk9v1DAQxSMEokvhC3BAlrhwyTK248SREBIq_1XEAThbjj1hnSbx1nZoy6fH0S4g9QDSyD7M7z1p5k1RPKawpUDr58NWDzhtGVC-hVxM3ik2VHBWStrQu8UGGi7KuhHNSfEgxgGA0kpU94sTxmspRd1sip-vXd9jwDkRuwSdnJ-J78nOfd-VekwuLRbJPmCJ13sfl4BEx-iN0wktuXJpR9IOiZuNszgbXLXaLAnJ5Jc5aTeT6MzFjDGS7PxRZ7dPx87D4l6vx4iPjv9p8e3tm69n78vzz-8-nL06L03VsFTqGrkBgdBqsKbSVIK1DQgDlTWNrlvRCcgvt1XPRFsL7HrT2dpU3FLRIT8tnh1898FfLhiTmlw0OI56Rr9ERSVvOAMO_P8ob9uWc2BtRp_eQge_hDkPslKykiDqOlPsQJngYwzYq31wkw43ioJaQ1SDWkNUa4gKcjGZRU-O1ks3of0j-Z1aBl4cAMxr--EwqGjcun7rApqkrHf_9n95S25GNzujxwu8wfh3DhWZAvVlPaP1iijPFyRZxX8B4C_DRw</recordid><startdate>20130701</startdate><enddate>20130701</enddate><creator>Weng, Yi-Ming, MD</creator><creator>Chiu, Yu-Hui, MD</creator><creator>Lynn, Jiun-Jen, MD</creator><creator>Li, Wen-Cheng, MD</creator><creator>Wang, Shih-Hao, MD</creator><creator>Kao, Wei-Fong, MD</creator><creator>Hsu, Tai-Yi, MD</creator><creator>Chiu, Te-Fa, MD</creator><creator>Lin, Yu-Jr</creator><creator>Chan, Chang-Wei, MD</creator><general>Elsevier Inc</general><general>Elsevier Limited</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7RV</scope><scope>7T5</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>H94</scope><scope>K9.</scope><scope>KB0</scope><scope>M0S</scope><scope>M1P</scope><scope>M2O</scope><scope>MBDVC</scope><scope>NAPCQ</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope><scope>7X8</scope><scope>7U7</scope><scope>C1K</scope></search><sort><creationdate>20130701</creationdate><title>Different duration of high-altitude pre-exposure associated with the incidence of acute mountain sickness on Jade Mountain</title><author>Weng, Yi-Ming, MD ; Chiu, Yu-Hui, MD ; Lynn, Jiun-Jen, MD ; Li, Wen-Cheng, MD ; Wang, Shih-Hao, MD ; Kao, Wei-Fong, MD ; Hsu, Tai-Yi, MD ; Chiu, Te-Fa, MD ; Lin, Yu-Jr ; Chan, Chang-Wei, MD</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c472t-a6e3c05e09a0dc4a180dd705c04dc7a695b506953d4f25965ebfcbd6c43d15be3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Acclimatization</topic><topic>Acute Disease</topic><topic>Adult</topic><topic>Age</topic><topic>Altitude</topic><topic>Altitude Sickness - epidemiology</topic><topic>Altitude Sickness - etiology</topic><topic>Altitude Sickness - prevention & control</topic><topic>Body mass index</topic><topic>Climbing</topic><topic>Emergency</topic><topic>Emergency medical care</topic><topic>Evacuations & rescues</topic><topic>Exposure</topic><topic>Female</topic><topic>Humans</topic><topic>Incidence</topic><topic>Logistic Models</topic><topic>Male</topic><topic>Middle Aged</topic><topic>Mountaineering</topic><topic>National parks</topic><topic>Observational studies</topic><topic>Prospective Studies</topic><topic>Questionnaires</topic><topic>Rain</topic><topic>Regression analysis</topic><topic>Risk Factors</topic><topic>Severity of Illness Index</topic><topic>Surveys and Questionnaires</topic><topic>Taiwan</topic><topic>Time Factors</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Weng, Yi-Ming, MD</creatorcontrib><creatorcontrib>Chiu, Yu-Hui, MD</creatorcontrib><creatorcontrib>Lynn, Jiun-Jen, MD</creatorcontrib><creatorcontrib>Li, Wen-Cheng, MD</creatorcontrib><creatorcontrib>Wang, Shih-Hao, MD</creatorcontrib><creatorcontrib>Kao, Wei-Fong, MD</creatorcontrib><creatorcontrib>Hsu, Tai-Yi, MD</creatorcontrib><creatorcontrib>Chiu, Te-Fa, MD</creatorcontrib><creatorcontrib>Lin, Yu-Jr</creatorcontrib><creatorcontrib>Chan, Chang-Wei, MD</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Nursing & Allied Health Database</collection><collection>Immunology Abstracts</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Nursing & Allied Health Database (Alumni Edition)</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>Research Library</collection><collection>Research Library (Corporate)</collection><collection>Nursing & Allied Health Premium</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central Basic</collection><collection>MEDLINE - Academic</collection><collection>Toxicology Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><jtitle>The American journal of emergency medicine</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Weng, Yi-Ming, MD</au><au>Chiu, Yu-Hui, MD</au><au>Lynn, Jiun-Jen, MD</au><au>Li, Wen-Cheng, MD</au><au>Wang, Shih-Hao, MD</au><au>Kao, Wei-Fong, MD</au><au>Hsu, Tai-Yi, MD</au><au>Chiu, Te-Fa, MD</au><au>Lin, Yu-Jr</au><au>Chan, Chang-Wei, MD</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Different duration of high-altitude pre-exposure associated with the incidence of acute mountain sickness on Jade Mountain</atitle><jtitle>The American journal of emergency medicine</jtitle><addtitle>Am J Emerg Med</addtitle><date>2013-07-01</date><risdate>2013</risdate><volume>31</volume><issue>7</issue><spage>1113</spage><epage>1117</epage><pages>1113-1117</pages><issn>0735-6757</issn><eissn>1532-8171</eissn><abstract>Abstract Objective The objective of this study is to determine the association between the duration of high-altitude (> 3000 m) pre-exposure and acute mountain sickness (AMS) incidence. Methods A prospective observational study was conducted on 2 random days each month from April 2007 to March 2008 at Paiyun Lodge (3402 m), Jade Mountain, Taiwan. Demographic data, prior AMS history, symptoms, and scores and the days and times of high-altitude pre-exposure within the preceding 2 months were obtained from lowland (< 1500 m) trekkers. Results Totally, 1010 questionnaires were analyzed; 106, 76, and 828 trekkers had pre-exposure lasting at least 3 days (group 1), less than 3 days (group 2), and 0 days (group 3), respectively. Acute mountain sickness incidence was significantly higher in groups 2 and 3 than in group 1 (21.70%, 35.53%, 37.08%, respectively; P = .008). Logistic regression analysis indicated a significantly lower AMS risk in group 1 (group 1, P = .004; odds ratio [OR], 0.479; 95% confidence interval [CI], 0.290-0.791; group 2, P = .226; OR, 0.725; 95% CI, 0.430-1.221). In group 1, 28 and 78 trekkers had single and intermittent multiple pre-exposure, respectively. There was no difference in the incidence or severity of AMS symptoms between single and intermittent multiple pre-exposure (AMS, P = .838; headache, P = .891; dizziness or lightheadedness, P = .414; fatigue and/or weakness, P = .957; gastrointestinal symptoms, P = .257; difficulty sleeping, P = .804; AMS score, P = .796). Conclusions High-altitude pre-exposure lasting at least 3 days within the preceding 2 months was associated with a significant lower AMS incidence during a subsequent ascent among Jade Mountain trekkers.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>23688567</pmid><doi>10.1016/j.ajem.2013.03.028</doi><tpages>5</tpages></addata></record> |
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subjects | Acclimatization Acute Disease Adult Age Altitude Altitude Sickness - epidemiology Altitude Sickness - etiology Altitude Sickness - prevention & control Body mass index Climbing Emergency Emergency medical care Evacuations & rescues Exposure Female Humans Incidence Logistic Models Male Middle Aged Mountaineering National parks Observational studies Prospective Studies Questionnaires Rain Regression analysis Risk Factors Severity of Illness Index Surveys and Questionnaires Taiwan Time Factors |
title | Different duration of high-altitude pre-exposure associated with the incidence of acute mountain sickness on Jade Mountain |
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