Socioeconomic and geographic variation in adjuvant chemotherapy among elderly patients with stage III colon cancer in Norway - a national register-based cohort study.

Background: About half of the patients diagnosed with colon cancer are 70 years or older. Standard treatment for stage III colon cancer is major surgical resection followed by adjuvant chemotherapy (ACT). Norwegian guidelines recommend initiation of ACT within 6 weeks after resection.

Geographic and socioeconomic variation in treatment of elderly prostate cancer patients in Norway - a national register-based study.

Purpose: The aim of this study was to examine geographic and socioeconomic variation in curative treatment and choice of treatment modality among elderly prostate cancer (PCa) patients.

Methods: This register-based cohort study included all Norwegian men ≥ 70 years when diagnosed with non-metastatic, high-risk PCa in 2011-2020 (n = 10 807). Individual data were obtained from the Cancer Registry of Norway, the Norwegian Prostate Cancer Registry, and Statistics Norway.

Exploring variation in timely reperfusion treatment in ST-segment elevation myocardial infarction in Norway: a national register-based cohort study.

Objectives: This study aimed to investigate determinants of reperfusion within recommended time limits (timely reperfusion) for ST-segment elevation myocardial infarction patients, exploring the impact of geography, patient characteristics and socio-economy.

Design: National register-based cohort study.

Setting: Multilevel logistic regression models were applied to examine the associations between timely reperfusion and residency in hospital referral areas and municipalities, patient characteristics, and socio-economy.

A controlled cohort study of long-term income in colorectal cancer patients.

Purpose: The study aims to investigate long-term development in annual labor income (ALI) among patients with colorectal cancer (CRC) compared to individually matched cancer-free controls.

Methods: In a register-based cohort study based on data from Norwegian national registries, 752 patients diagnosed with CRC 1992-1996 at the age 45-54 years were observed annually up to 10 years post-diagnosis. Also, 752 individually matched controls were observed correspondingly.

A controlled cohort study of sickness absence and disability pension in colorectal cancer survivors.

Purpose: To investigate long-term development of sickness absence and disability pension among colorectal cancer (CRC) survivors compared to matched cancer-free controls, and to assess to what degree socio-demographic and disease characteristics influence these outcomes.

Patients And Methods: In a register-based cohort study with data from the Cancer Registry of Norway and longitudinal data from other national registries, 740 patients with CRC diagnosed 1992-1996 at the age 45-54 years were observed up to 14 years post-diagnosis. Also 740 matched controls were observed over the same time period.

A cohort study of permanently reduced work ability in breast cancer patients.

Purpose: The aims of this cohort study were to explore various longitudinal aspects of employment and disability pension due to permanently reduced work ability among women with breast cancer and to investigate the impact of breast cancer on income.

Patients And Methods: In a national register-based controlled cohort study from Norway, 1,548 women diagnosed with breast cancer (all stages) between 1992 and 1996 at the age 45-54 years and 1,548 cancer-free women matched for age, municipality and civil status were followed for up to 14 years. Medical data from the Cancer Registry of Norway were linked with longitudinal data on employment, social security benefits and socio-demography collected from other national official registries.

Sentinel node mapping does not improve staging of lymph node metastasis in colonic cancer.

Purpose: This study was designed to evaluate the reliability of the sentinel node concept in colonic cancer.

Methods: Patent blue was used as tracer. The four blue nodes closest to the tumor were defined as the sentinel node(s) by the pathologist.