Browsing USN Open Archive by Author "Hoff, Geir"
Now showing items 1-15 of 15
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Air and carbon dioxide volumes insufflated during colonoscopy
Bretthauer, Michael; Hoff, Geir; Thiis-Evensen, Espen; Huppertz-Hauss, Gert; Skovlund, Eva (Journal article; Peer reviewed, 2003)BACKGROUND: During colonoscopy, air or carbon dioxide is insufflated to secure adequate visualization of the colon, and endoscopy trainees are reminded to use as little gas as possible to avoid patient discomfort. However, ... -
Colonoscopy without sedation
Hoff, Geir (Journal article; Peer reviewed, 2000) -
CRC screening: review of the evidence and suggestions on when and how to move on from randomized trials to screening programmes
Hoff, Geir (Journal article; Peer reviewed, 2004) -
Evaluation of a novel colonoscope designed for easier passage of flexures : a randomised study
Hoff, Geir; Bretthauer, Michael; Huppertz-Hauss, Gert; Sauar, Jostein; Paulsen, Jørn; Dahler, Stein; Kjellevold, Øystein (Journal article; Peer reviewed, 2005)Background and Study Aims: A new colonoscope (XCF-Q160AW prototype, Olympus, Tokyo, Japan) has been developed, designed with an additional passive bending function to ease intubation through the left colonic flexure. In ... -
Expression of NDRG2 is down-regulated in high-risk adenomas and colorectal carcinoma
Lorentzen, Anders; Vogel, Lotte K.; Lewinsky, Rikke H.; Sæbø, Mona; Skjelbred, Camilla Furu; Godiksen, Sine; Hoff, Geir; Lothe, Inger Marie Bowitz; Ikdahl, Tone; Kure, Elin H.; Mitchelmore, Cathy (Journal article; Peer reviewed, 2007-10-12)BACKGROUND: It has recently been shown that NDRG2 mRNA is down-regulated or undetectable in several human cancers and cancer cell-lines. Although the function of NDRG2 is unknown, high NDRG2 expression correlates with ... -
Impact of a colonoscopic screening examination for colorectal cancer on later utilization of distal GI endoscopies
Thiis-Evensen, Espen; Seip, Birgitte; Vatn, Morten H.; Hoff, Geir (Journal article; Peer reviewed, 2006)Background: Colonoscopic screening for colorectal cancer is being implemented in an increasing number of countries. This might lead to a demand for colonoscopies that could outstrip supply. Objective: We wanted to investigate ... -
Lifestyle as a predictor for colonic neoplasia in asymptomatic individuals
Larsen, Inger Kristin; Grotmol, Tom; Almendingen, Kari; Hoff, Geir (Journal article; Peer reviewed, 2006-01-13)BACKGROUND: Lifestyle is a well-established risk factor for colorectal cancer (CRC) and is also found to be associated with occurrence of adenomas. In the present study we evaluated risk factors for both low-risk adenomas ... -
Meat, vegetables and genetic polymorphisms and the risk of colorectal carcinomas and adenomas
Skjelbred, Camilla Furu; Sæbø, Mona; Hjartåker, Anette; Grotmol, Tom; Hansteen, Inger-Lise; Tveit, Kjell M.; Hoff, Geir; Kure, Elin H. (Journal article; Peer reviewed, 2007-12-19)BACKGROUND: The risk of sporadic colorectal cancer (CRC) is mainly associated with lifestyle factors, particularly dietary factors. Diets high in red meat and fat and low in fruit and vegetables are associated with an ... -
Med åpent blikk utenfor egen institusjon
Hoff, Geir (Journal article; Peer reviewed, 2001)Even in a country like Norway, with a poor reputation for investment in medical research, some studies may materialise against all odds. This is the story about the difficult start and first few years of flexible sigmoidoscopy ... -
Quality control in colorectal cancer screening: systematic microbiological investigation of endoscopes used in the NORCCAP (Norwegian Colorectal Cancer Prevention) trial
Bretthauer, Michael; Jørgensen, Anita; Kristiansen, Bjørn Erik; Hofstad, Bjørn; Hoff, Geir (Journal article; Peer reviewed, 2003-06-13)BACKGROUND: Endoscopic colorectal cancer (CRC) screening is currently implemented in many countries. Since endoscopes cannot be sterilised, the transmission of infectious agents through endoscopes has been a matter of ... -
Re: Baseline findings of the Italian multicenter randomized controlled trial of "once-only sigmoidoscopy"--SCORE
Hoff, Geir; Bretthauer, Michael; Skovlund, Eva; Grotmol, Tom (Journal article; Peer reviewed, 2003) -
Screening for colorectal cancer
Hakama, Matti; Hoff, Geir; Kronborg, Ole; Påhlman, Lars (Journal article; Peer reviewed, 2005)Colorectal cancer (CRC) is the most common cancer in the Nordic countries after breast and prostate cancer. About 15 000 new cancers are diagnosed and more than 7 000 patients will die from CRC in 2005. CRC fulfils most ... -
Testing for faecal calprotectin (PhiCal) in the Norwegian Colorectal Cancer Prevention trial on flexible sigmoidoscopy screening: comparison with an immunochemical test for occult blood (FlexSure OBT)
Hoff, Geir; Grotmol, Tom; Thiis-Evensen, Espen; Bretthauer, Michael; Gondal, Ghous G.; Vatn, Morten H. (Journal article; Peer reviewed, 2004)BACKGROUND: Screening for colorectal cancer (CRC) using guaiac based faecal occult blood tests (FOBT) has an estimated programme sensitivity of >60% but <30% for strictly asymptomatic CRC in a single screening round. In ... -
The science and politics of colorectal cancer screening
Hoff, Geir; Bretthauer, Michael (Journal article; Peer reviewed, 2006) -
Use of a disposable sheath system for flexible sigmoidoscopy in decentralized colorectal cancer screening
Bretthauer, Michael; Hoff, Geir; Thiis-Evensen, Espen; Grotmol, Tom; Larsen, Inger Kristin; Kjellevold, Øystein; Skovlund, Eva (Journal article; Peer reviewed, 2002)Background and Study Aims: To prevent transmission of infectious agents and to reduce instrument reprocessing time, the use of disposable sheath systems instead of conventionally reprocessed endoscopes has been promoted ...