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
Hauptverfasser: 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
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container_end_page 1117
container_issue 7
container_start_page 1113
container_title The American journal of emergency medicine
container_volume 31
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 (&lt; 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 &amp; control ; Body mass index ; Climbing ; Emergency ; Emergency medical care ; Evacuations &amp; 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 (&gt; 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 (&lt; 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 &amp; control</subject><subject>Body mass index</subject><subject>Climbing</subject><subject>Emergency</subject><subject>Emergency medical care</subject><subject>Evacuations &amp; 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 &amp; control</topic><topic>Body mass index</topic><topic>Climbing</topic><topic>Emergency</topic><topic>Emergency medical care</topic><topic>Evacuations &amp; 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 &amp; 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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 (&lt; 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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source MEDLINE; Elsevier ScienceDirect Journals; ProQuest Central UK/Ireland
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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