{"id":6149,"date":"2026-10-19T09:48:34","date_gmt":"2026-10-19T09:48:34","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-lydheilsuvisindum-alfheidur-haraldsdottir\/"},"modified":"2026-10-19T09:48:34","modified_gmt":"2026-10-19T09:48:34","slug":"doktorsvorn-i-lydheilsuvisindum-alfheidur-haraldsdottir","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-lydheilsuvisindum-alfheidur-haraldsdottir\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed l\u00fd\u00f0heilsuv\u00edsindum – \u00c1lfhei\u00f0ur Haraldsd\u00f3ttir"},"content":{"rendered":"
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F\u00f6studaginn 21. febr\u00faar ver \u00c1lfhei\u00f0ur Haraldsd\u00f3ttir doktorsritger\u00f0 s\u00edna \u00ed l\u00fd\u00f0heilsuv\u00edsindum vi\u00f0 Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideild H\u00e1sk\u00f3la \u00cdslands. Ritger\u00f0in ber heiti\u00f0: Tengsl vaxtarhra\u00f0a \u00e1 unglings\u00e1rum og matar\u00e6\u00f0is \u00e1 l\u00edfslei\u00f0inni vi\u00f0 brj\u00f3stakrabbameins\u00e1h\u00e6ttu.<\/strong> The role of adolescent growth rate and diet across the lifespan in breast cancer risk.<\/strong><\/p>\n

Andm\u00e6lendur eru dr. Heather Eliassen, d\u00f3sent vi\u00f0 Harvard T.H. Chan School of Public Health \u00ed Bandar\u00edkjunum, og dr. Sigr\u00ed\u00f0ur L\u00e1ra Gu\u00f0mundsd\u00f3ttir, d\u00f3sent vi\u00f0 Menntav\u00edsindasvi\u00f0 H\u00e1sk\u00f3la \u00cdslands.<\/p>\n

Umsj\u00f3narkennari var dr. Laufey Steingr\u00edmsd\u00f3ttir, pr\u00f3fessor emerita vi\u00f0 Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideild H\u00e1sk\u00f3la \u00cdslands, og lei\u00f0beinandi var dr. J\u00f3hanna Eyr\u00fan Torfad\u00f3ttir, a\u00f0junkt vi\u00f0 Mi\u00f0st\u00f6\u00f0 \u00ed l\u00fd\u00f0heilsuv\u00edsindum vi\u00f0 Heilbrig\u00f0isv\u00edsindasvi\u00f0. Auk \u00feeirra s\u00e1tu \u00ed doktorsnefnd Unnur Anna Valdimarsd\u00f3ttir, pr\u00f3fessor vi\u00f0 Mi\u00f0st\u00f6\u00f0 \u00ed l\u00fd\u00f0heilsuv\u00edsindum vi\u00f0 Heilbrig\u00f0isv\u00edsindasvi\u00f0, Laufey Tryggvad\u00f3ttir, framkv\u00e6mdastj\u00f3ri Krabbameinsskr\u00e1r Krabbameinsf\u00e9lags \u00cdslands og Hans-Olov Adami, pr\u00f3fessor emeritus vi\u00f0 Karolinska Institutet \u00ed Sv\u00ed\u00fej\u00f3\u00f0.<\/p>\n

\u00d3l\u00f6f Gu\u00f0n\u00fd Geirsd\u00f3ttir, pr\u00f3fessor og forseti Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideildar, stj\u00f3rnar ath\u00f6fninni sem fer fram \u00ed H\u00e1t\u00ed\u00f0arsal H\u00e1sk\u00f3la \u00cdslands og hefst kl. 9:00.<\/p>\n

\u00c1grip<\/strong><\/p>\n

Brj\u00f3stakrabbamein er algengasta krabbamein me\u00f0al kvenna \u00ed dag. Helstu \u00e1h\u00e6ttu\u00fe\u00e6ttir tengjast \u00e6xlunar\u00fe\u00e1ttum en einnig hreyfingu, \u00e1fengisneyslu og l\u00edkams\u00feyngd. Matar\u00e6\u00f0i er einnig tali\u00f0 tengjast \u00e1h\u00e6ttunni vi\u00f0 a\u00f0 greinast me\u00f0 meini\u00f0 \u00fe\u00f3tt ni\u00f0urst\u00f6\u00f0ur ranns\u00f3kna s\u00e9u misv\u00edsandi og \u00f3lj\u00f3sar. F\u00e1ar ranns\u00f3knir hafa veri\u00f0 birtar um tengsl brj\u00f3stakrabbameins og matar\u00e6\u00f0is og vaxtar \u00e1 unglings\u00e1rum, \u00feegar brj\u00f3stvefurinn er a\u00f0 vaxa og \u00feroskast. Meginmarkmi\u00f0 \u00feessarar ranns\u00f3knar var \u00fev\u00ed a\u00f0 efla \u00feekkingu \u00e1 tengslum vaxtarhra\u00f0a \u00ed \u00e6sku og matar\u00e6\u00f0is \u00e1 l\u00edfslei\u00f0inni vi\u00f0 brj\u00f3stakrabbameins\u00e1h\u00e6ttu.<\/p>\n

Helstu ni\u00f0urst\u00f6\u00f0ur ranns\u00f3knarinnar benda til \u00feess a\u00f0 b\u00e6\u00f0i matar\u00e6\u00f0i \u00e1 unglings\u00e1rum og vaxtarhra\u00f0i tengist brj\u00f3stakrabbameins\u00e1h\u00e6ttu s\u00ed\u00f0ar \u00e1 \u00e6vinni. R\u00edfleg neysla \u00e1 fiski og haframj\u00f6li tengdust minni \u00e1h\u00e6ttu en mikil r\u00fagbrau\u00f0sneysla \u00e1 unglings\u00e1rum sem og \u00e1 mi\u00f0jum aldri tengdist aukinni \u00e1h\u00e6ttu a\u00f0 greinast me\u00f0 meini\u00f0. \u00de\u00e1 reyndist hra\u00f0ur v\u00f6xtur \u00e1 unglings\u00e1rum auka \u00e1h\u00e6ttuna og einnig voru v\u00edsbendingar um a\u00f0 f\u00e6\u00f0umynstur \u00e1 efri \u00e1rum sem einkenndist af s\u00e6tmeti tengdist aukinni \u00e1h\u00e6ttu. \u00deessar ni\u00f0urst\u00f6\u00f0ur undirstrika mikilv\u00e6gi l\u00edfsh\u00e1tta, b\u00e6\u00f0i \u00e1 fyrri hluta \u00e6vinnar en einnig s\u00ed\u00f0ar \u00e1 \u00e6vinni, \u00ed \u00fer\u00f3un brj\u00f3stakrabbameins og eru mikilv\u00e6gt framlag til aukinnar \u00feekkingar \u00e1 fl\u00f3knum tengslum matar\u00e6\u00f0is og brj\u00f3stakrabbameins.<\/p>\n

Abstract<\/strong><\/p>\n

Breast cancer is currently the most common cancer among women. Risk factors mostly involve host, reproduction and lifestyle factors, like physical activity, alcohol consumption and body weight. Diet is also thought to influence breast cancer development although studies on the subject have been inconclusive. However, studies on diet during adolescence, a sensitive period when the breast tissue is growing and maturing, are scarce. Therefore, the aim of this study was to advance knowledge on the association of growth rate in early life and lifelong dietary habits on breast cancer later in life.<\/p>\n

The results of the study suggest that both diet and rapid growth rate in adolescence are associated with the risk of breast cancer later in life. While high consumption of fish and oatmeal seem to reduce the risk og breast cancer, fast growth rate and high consumption of rye bread in adolescence, and midlife, are associated with increased risk. In addition, high adherence in late life to a dietary pattern characterized by pastries, sweets and soda in late life were associated with higher risk of breast cancer. These results highlight the importance of environmental exposures throughout the life course in the development of the disease, particularly in early life. This work is also an important contribution to the extending base of knowledge on dietary causes of cancer.<\/p>\n

Um doktorsefni\u00f0<\/strong><\/p>\n

\u00c1lfhei\u00f0ur Haraldsd\u00f3ttir er f\u00e6dd \u00e1ri\u00f0 1976. H\u00fan lauk BS-pr\u00f3fi \u00ed hj\u00fakrunarfr\u00e6\u00f0i 2003 fr\u00e1 H\u00e1sk\u00f3la \u00cdslands og meistaragr\u00e1\u00f0u \u00ed l\u00fd\u00f0heilsuv\u00edsindum vi\u00f0 sama sk\u00f3la \u00e1ri\u00f0 2011. \u00c1lfhei\u00f0ur hefur samhli\u00f0a doktorsn\u00e1mi sinnt kennslutengdum verkefnum vi\u00f0 Mi\u00f0st\u00f6\u00f0 \u00ed l\u00fd\u00f0heilsuv\u00edsindum. Fa\u00f0ir \u00c1lfhei\u00f0ar var Haraldur Karlsson og m\u00f3\u00f0ir er Ald\u00eds J\u00f3nsd\u00f3ttir. Maki \u00c1lfhei\u00f0ar er J\u00f3hann P\u00e1ll Ingimarsson og d\u00e6tur \u00feeirra eru Freyja Bjarnveig 11 \u00e1ra og Br\u00edet Bj\u00f6rk 6 \u00e1ra.<\/p>\n<\/div><\/div>","protected":false},"featured_media":2070,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_phd_date_start":"2020-02-21T09:00:00+00:00","_phd_date_end":"2020-02-21T12:00:00+00:00","_phd_location":"A\u00f0albygging H\u00e1t\u00ed\u00f0arsalur","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"Tengsl vaxtarhra\u00f0a \u00e1 unglings\u00e1rum og matar\u00e6\u00f0is \u00e1 l\u00edfslei\u00f0inni vi\u00f0 brj\u00f3stakrabbameins\u00e1h\u00e6ttu. 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