Night Work and Breast Cancer Risk Among Norwegian Nurses: Assessment by Different Exposure Metrics
Associations between night work and breast cancer risk were investigated in a nested case-control study within a cohort of 49,402 Norwegian nurses. A total of 699 (74%) of the live cases diagnosed in 1990-2007 and 895 (65%) controls, cancer free at the time of sampling, were interviewed about work h...
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| Veröffentlicht in: | American journal of epidemiology 2011-06, Vol.173 (11), p.1272-1279 |
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| creator | LIE, Jenny-Anne S KJUUS, Helge ZIENOLDDINY, Shan HAUGEN, Aage STEVENS, Richard G KJAERHEIM, Kristina |
| description | Associations between night work and breast cancer risk were investigated in a nested case-control study within a cohort of 49,402 Norwegian nurses. A total of 699 (74%) of the live cases diagnosed in 1990-2007 and 895 (65%) controls, cancer free at the time of sampling, were interviewed about work history and potential risk factors. The odds ratios for risk of breast cancer in relation to different exposure metrics were estimated by multivariate unconditional logistic regression models. No increase of risk was found after long duration of work by nurses working ≥3 night shifts per month. Small, nonsignificantly increased risks were observed for exposure to ≥30 years in hospitals or other institutions (odds ratio (OR) = 1.1), ≥12 years in schedules including night work (OR = 1.3), ≥1,007 night shifts during the lifetime (OR = 1.2), and lifetime average number of ≥4 night shifts per month (OR = 1.2). Nonsignificantly increased risks of breast cancer were observed in nurses who worked ≥5 years with ≥4 (OR = 1.4) and ≥5 (OR = 1.6) consecutive night shifts. Significantly increased risks were seen in nurses who worked ≥5 years with ≥6 consecutive night shifts (OR = 1.8, 95% confidence interval: 1.1, 2.8). The results suggest that risk may be related to number of consecutive night shifts. |
| doi_str_mv | 10.1093/aje/kwr014 |
| format | Article |
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A total of 699 (74%) of the live cases diagnosed in 1990-2007 and 895 (65%) controls, cancer free at the time of sampling, were interviewed about work history and potential risk factors. The odds ratios for risk of breast cancer in relation to different exposure metrics were estimated by multivariate unconditional logistic regression models. No increase of risk was found after long duration of work by nurses working ≥3 night shifts per month. Small, nonsignificantly increased risks were observed for exposure to ≥30 years in hospitals or other institutions (odds ratio (OR) = 1.1), ≥12 years in schedules including night work (OR = 1.3), ≥1,007 night shifts during the lifetime (OR = 1.2), and lifetime average number of ≥4 night shifts per month (OR = 1.2). Nonsignificantly increased risks of breast cancer were observed in nurses who worked ≥5 years with ≥4 (OR = 1.4) and ≥5 (OR = 1.6) consecutive night shifts. Significantly increased risks were seen in nurses who worked ≥5 years with ≥6 consecutive night shifts (OR = 1.8, 95% confidence interval: 1.1, 2.8). The results suggest that risk may be related to number of consecutive night shifts.</description><identifier>ISSN: 0002-9262</identifier><identifier>EISSN: 1476-6256</identifier><identifier>DOI: 10.1093/aje/kwr014</identifier><identifier>PMID: 21454824</identifier><identifier>CODEN: AJEPAS</identifier><language>eng</language><publisher>Cary, NC: Oxford University Press</publisher><subject>Adult ; Age Factors ; Aged ; Biological and medical sciences ; Body Mass Index ; Breast cancer ; Breast Neoplasms - etiology ; Case-Control Studies ; Cohort Studies ; Epidemiology ; Female ; General aspects ; Gynecology. Andrology. Obstetrics ; Health participants ; Humans ; Mammary gland diseases ; Medical sciences ; Middle Aged ; Miscellaneous ; Norway ; Nurses ; Occupational diseases ; Public health. Hygiene ; Public health. 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A total of 699 (74%) of the live cases diagnosed in 1990-2007 and 895 (65%) controls, cancer free at the time of sampling, were interviewed about work history and potential risk factors. The odds ratios for risk of breast cancer in relation to different exposure metrics were estimated by multivariate unconditional logistic regression models. No increase of risk was found after long duration of work by nurses working ≥3 night shifts per month. Small, nonsignificantly increased risks were observed for exposure to ≥30 years in hospitals or other institutions (odds ratio (OR) = 1.1), ≥12 years in schedules including night work (OR = 1.3), ≥1,007 night shifts during the lifetime (OR = 1.2), and lifetime average number of ≥4 night shifts per month (OR = 1.2). Nonsignificantly increased risks of breast cancer were observed in nurses who worked ≥5 years with ≥4 (OR = 1.4) and ≥5 (OR = 1.6) consecutive night shifts. Significantly increased risks were seen in nurses who worked ≥5 years with ≥6 consecutive night shifts (OR = 1.8, 95% confidence interval: 1.1, 2.8). The results suggest that risk may be related to number of consecutive night shifts.</description><subject>Adult</subject><subject>Age Factors</subject><subject>Aged</subject><subject>Biological and medical sciences</subject><subject>Body Mass Index</subject><subject>Breast cancer</subject><subject>Breast Neoplasms - etiology</subject><subject>Case-Control Studies</subject><subject>Cohort Studies</subject><subject>Epidemiology</subject><subject>Female</subject><subject>General aspects</subject><subject>Gynecology. Andrology. Obstetrics</subject><subject>Health participants</subject><subject>Humans</subject><subject>Mammary gland diseases</subject><subject>Medical sciences</subject><subject>Middle Aged</subject><subject>Miscellaneous</subject><subject>Norway</subject><subject>Nurses</subject><subject>Occupational diseases</subject><subject>Public health. Hygiene</subject><subject>Public health. Hygiene-occupational medicine</subject><subject>Risk assessment</subject><subject>Risk Factors</subject><subject>Time Factors</subject><subject>Tumors</subject><subject>Womens health</subject><subject>Work Schedule Tolerance</subject><issn>0002-9262</issn><issn>1476-6256</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqN0VFL5DAQwPEgiu6pL34ACcJxIFSTNGkT3_b21BO8FY4TH0uaTtbubts10-L57S-yq4JP9zQEfgwT_oQccXbGmUnP7RzOF8-BcblFRlzmWZIJlW2TEWNMJEZkYo98QZwzxrlRbJfsCS6V1EKOSDmtZ489fejCgtq2ot8DWOzpxLYOAv1d44KOm66d0WkXnmFW25ZOh4CAF3SMcWADbU_LF_qj9h7C6-Py76rDIQD9BX2oHR6QHW-XCIebuU_ury7_TH4mt3fXN5PxbeKk5H3i86pMlWPaVrx0OpVGgbLGaZ9qy7TKHbfC5ZVwzObMRckhK73myruSlVm6T76t965C9zQA9kVTo4Pl0rbQDVhoY7gSqf4Pmek8MzlXUZ58kvNuCG38RqFzmQrNjYzodI1c6BAD-GIV6saGl4Kz4rVQEQsV60IRH282DmUD1Tt9SxLB1w2w6OzSh5iixg8nhZbxwPQfzxWZbQ</recordid><startdate>20110601</startdate><enddate>20110601</enddate><creator>LIE, Jenny-Anne S</creator><creator>KJUUS, Helge</creator><creator>ZIENOLDDINY, Shan</creator><creator>HAUGEN, Aage</creator><creator>STEVENS, Richard G</creator><creator>KJAERHEIM, Kristina</creator><general>Oxford University Press</general><general>Oxford Publishing Limited (England)</general><scope>IQODW</scope><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>7QP</scope><scope>7T2</scope><scope>7TK</scope><scope>7U7</scope><scope>7U9</scope><scope>C1K</scope><scope>H94</scope><scope>K9.</scope><scope>NAPCQ</scope><scope>7X8</scope><scope>7U1</scope></search><sort><creationdate>20110601</creationdate><title>Night Work and Breast Cancer Risk Among Norwegian Nurses: Assessment by Different Exposure Metrics</title><author>LIE, Jenny-Anne S ; KJUUS, Helge ; ZIENOLDDINY, Shan ; HAUGEN, Aage ; STEVENS, Richard G ; KJAERHEIM, Kristina</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c441t-f7db35c08ad1bc83495e5a9c8f38a0857c1a2c7d2c0a70c5c01e6bf815fcb0b63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Adult</topic><topic>Age Factors</topic><topic>Aged</topic><topic>Biological and medical sciences</topic><topic>Body Mass Index</topic><topic>Breast cancer</topic><topic>Breast Neoplasms - etiology</topic><topic>Case-Control Studies</topic><topic>Cohort Studies</topic><topic>Epidemiology</topic><topic>Female</topic><topic>General aspects</topic><topic>Gynecology. Andrology. Obstetrics</topic><topic>Health participants</topic><topic>Humans</topic><topic>Mammary gland diseases</topic><topic>Medical sciences</topic><topic>Middle Aged</topic><topic>Miscellaneous</topic><topic>Norway</topic><topic>Nurses</topic><topic>Occupational diseases</topic><topic>Public health. Hygiene</topic><topic>Public health. Hygiene-occupational medicine</topic><topic>Risk assessment</topic><topic>Risk Factors</topic><topic>Time Factors</topic><topic>Tumors</topic><topic>Womens health</topic><topic>Work Schedule Tolerance</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>LIE, Jenny-Anne S</creatorcontrib><creatorcontrib>KJUUS, Helge</creatorcontrib><creatorcontrib>ZIENOLDDINY, Shan</creatorcontrib><creatorcontrib>HAUGEN, Aage</creatorcontrib><creatorcontrib>STEVENS, Richard G</creatorcontrib><creatorcontrib>KJAERHEIM, Kristina</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Calcium & Calcified Tissue Abstracts</collection><collection>Health and Safety Science Abstracts (Full archive)</collection><collection>Neurosciences Abstracts</collection><collection>Toxicology Abstracts</collection><collection>Virology and AIDS Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Nursing & Allied Health Premium</collection><collection>MEDLINE - Academic</collection><collection>Risk Abstracts</collection><jtitle>American journal of epidemiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>LIE, Jenny-Anne S</au><au>KJUUS, Helge</au><au>ZIENOLDDINY, Shan</au><au>HAUGEN, Aage</au><au>STEVENS, Richard G</au><au>KJAERHEIM, Kristina</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Night Work and Breast Cancer Risk Among Norwegian Nurses: Assessment by Different Exposure Metrics</atitle><jtitle>American journal of epidemiology</jtitle><addtitle>Am J Epidemiol</addtitle><date>2011-06-01</date><risdate>2011</risdate><volume>173</volume><issue>11</issue><spage>1272</spage><epage>1279</epage><pages>1272-1279</pages><issn>0002-9262</issn><eissn>1476-6256</eissn><coden>AJEPAS</coden><abstract>Associations between night work and breast cancer risk were investigated in a nested case-control study within a cohort of 49,402 Norwegian nurses. A total of 699 (74%) of the live cases diagnosed in 1990-2007 and 895 (65%) controls, cancer free at the time of sampling, were interviewed about work history and potential risk factors. The odds ratios for risk of breast cancer in relation to different exposure metrics were estimated by multivariate unconditional logistic regression models. No increase of risk was found after long duration of work by nurses working ≥3 night shifts per month. Small, nonsignificantly increased risks were observed for exposure to ≥30 years in hospitals or other institutions (odds ratio (OR) = 1.1), ≥12 years in schedules including night work (OR = 1.3), ≥1,007 night shifts during the lifetime (OR = 1.2), and lifetime average number of ≥4 night shifts per month (OR = 1.2). Nonsignificantly increased risks of breast cancer were observed in nurses who worked ≥5 years with ≥4 (OR = 1.4) and ≥5 (OR = 1.6) consecutive night shifts. Significantly increased risks were seen in nurses who worked ≥5 years with ≥6 consecutive night shifts (OR = 1.8, 95% confidence interval: 1.1, 2.8). The results suggest that risk may be related to number of consecutive night shifts.</abstract><cop>Cary, NC</cop><pub>Oxford University Press</pub><pmid>21454824</pmid><doi>10.1093/aje/kwr014</doi><tpages>8</tpages></addata></record> |
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| ispartof | American journal of epidemiology, 2011-06, Vol.173 (11), p.1272-1279 |
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| source | Oxford University Press Journals All Titles (1996-Current); MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection |
| subjects | Adult Age Factors Aged Biological and medical sciences Body Mass Index Breast cancer Breast Neoplasms - etiology Case-Control Studies Cohort Studies Epidemiology Female General aspects Gynecology. Andrology. Obstetrics Health participants Humans Mammary gland diseases Medical sciences Middle Aged Miscellaneous Norway Nurses Occupational diseases Public health. Hygiene Public health. Hygiene-occupational medicine Risk assessment Risk Factors Time Factors Tumors Womens health Work Schedule Tolerance |
| title | Night Work and Breast Cancer Risk Among Norwegian Nurses: Assessment by Different Exposure Metrics |
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