Serum-albumin and risk of thyroid cancer: A population-based, matched case-control study
نویسندگان
چکیده
Flere epidemiologiske undersøkelser fra 1980og 1990-årene har funnet en invers assosiasjon mellom salbuminnivået og sykelighet/dødelighet av kreft. I utforskningen av skjoldkjertelkreftens etiologi og patogenese ble det derfor ansett som viktig å finne og bestemme styrken av en slik sammenheng når det gjelder skjoldkjertelkreft. Derfor ble alle med tilstrekkelig mengde serum deponert i Janusbanken og som senere i perioden 1973-1994, ifølge Kreftregisterets database, hadde fått skjoldkjertelkreft, identifisert – i alt 118 tilfeller. For hvert tilfelle ble det tilfeldig valgt ut tre friske kontroller med serum i Janus. Kontrollene ble matchet mot pasientene hva gjelder kjønn, alder, bostedsfylke og serums lagringstid. Etter dette sto man igjen med 114 tilfeller (78 papillære karsinomer, 19 follikulære og 17 av andre histologiske typer) og 333 kontroller. Albumin i serum ble bestemt med bromkresolgrønt-metoden og fri fettsyrer ble bestemt med en enzymatisk metode. Resultatene av denne populasjonsbaserte pasient-kontroll studien ble i korthet at man etter justering for fri fettsyrer ikke fant noen sammenheng mellom s-albumin og kreftrisiko for tilfeller der serum var tatt mer enn 6,6 år før diagnose. For serum tatt mindre enn 6,6 år før diagnose var det derimot en mulig positiv assosiasjon for de papillære karsinomene og en sannsynlig positiv assosiasjon for de follikulære karsinomene. Man fant altså ingen invers assosiasjon mellom s-albumin og skjoldkjertelkreft. I en kortfattet diskusjon omtales noen konfunderingsfaktorer som kan ha bidratt til resultatet.
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