Data quality at the Cancer Registry of Norway: An overview of comparability, completeness, validity and timeliness

Larsen, Inger Kristin; Småstuen, Milada Cvancarova; Johannesen, Tom Børge; Langmark, Frøydis; Parkin, Donald Maxwell; Bray, Freddie; Møller, Bjørn

doi:10.1016/j.ejca.2008.10.037

Cited by 728 publications

(722 citation statements)

References 18 publications

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“…Mandatory reporting from several independent sources ensures completeness and high data quality 40. The Cause of Death Registry contains information on all recorded deaths of Norwegian citizens living in Norway at time of death since 1st of January 1951.…”

Section: Methodsmentioning

confidence: 99%

Measured cardiorespiratory fitness and self‐reported physical activity: associations with cancer risk and death in a long‐term prospective cohort study

et al. 2016

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Physical activity is inversely associated with risk of some cancers. The relation with cancer‐specific death remains uncertain. Mainly, studies on relationships between physical activity and cancer are based on self‐reported physical activity (SPA). Hereby, we examined whether measured cardiorespiratory fitness (CRF) is associated with cancer risk, mortality, and case fatality. We also describe relationships between SPA and these outcomes, and between CRF and SPA. A cohort of 1997 healthy Norwegian men, aged 40–59 years at inclusion in 1972–75, was followed throughout 2012. At baseline, CRF was objectively measured. SPA (leisure time and occupational) was obtained through a questionnaire. Relationships between CRF or SPA, and the outcomes were estimated using Cox regression, adjusted for age, body mass index (BMI), and smoking. Pearson correlation coefficients evaluated agreements between CRF and SPA. During follow‐up, 758 men were diagnosed with cancer and 433 cancer deaths occurred. Analyses revealed lower cancer risk (Hazard ratio [HR] 0.85, 95% confidence intervals [CI]: 0.68–1.00), mortality (HR 0.68, 95% CI: 0.53–0.88), and case fatality (HR 0.74, 95% CI: 0.57–0.96), in men with high CRF compared to low CRF. Light leisure time SPA was associated with lower cancer risk (HR 0.70, 95% CI: 0.56–0.86) and mortality (HR 0.64 95% CI: 0.49–0.83), whereas strenuous occupational SPA was associated with higher risks (HR 1.42, 95% CI: 1.13–1.78 and HR 1.45, 95% CI: 1.09–1.93). Correlations between CRF and SPA were 0.351 (P < 0.001) and −0.106 (P < 0.001) for leisure time and occupational SPA, respectively. A high midlife CRF may be beneficial for cancer risk, cancer mortality, and case fatality.

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Section: Methodsmentioning

confidence: 99%

Measured cardiorespiratory fitness and self‐reported physical activity: associations with cancer risk and death in a long‐term prospective cohort study

et al. 2016

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“…|Bias| max < 1/4·CV ref = 1/16 · (upper reference limit-lower reference limit) [4] since the width of the reference interval is 2· ( …”

Section: Analytical Phasementioning

confidence: 99%

Long‐term stability of serum components in the Janus Serum Bank

Gislefoss

Grimsrud

Mørkrid

2008

Scandinavian Journal of Clinical and Laboratory Investigation

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“…The Cancer Registry database is considered more than 98% complete on solid tumours. 24 The main limitation to our study is the small study group. However, using the NPI, which combines three different prognostic factors, it is possible to demonstrate statistically significant differences between asymptomatic and symptomatic breast cancers.…”

Section: Discussionmentioning

confidence: 99%

Asymptomatic Breast Cancer in Non-Participants of the National Screening Programme in Norway: A Confounding Factor in Evaluation?

Hoff

Klepp²,

Hofvind

2012

J Med Screen

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Objective To evaluate the extent and histopathological characteristics of asymptomatic breast cancer detected outside the Norwegian Breast Cancer Screening Program (NBCSP) in women targeted by the programme. Methods Our study included 568 primary breast cancers (523 invasive and 45 ductal carcinoma in situ) diagnosed in 553 women aged 50 -70, residing in Møre og Romsdal County, 2002County, -2008. The cancers were divided into screening-detected cancers in the NBCSP, interval cancers (ICs) and cancers detected in women not participating in the NBCSP (never participated and lapsed attendees), and further into asymptomatic and symptomatic cancers. Nottingham Prognostic Index (NPI) was used for comparisons across the groups and the distributions were compared using chi-square tests for statistical significance. Results Twenty percent (19/97) of the ICs and 32% (69/213) of the breast cancers in nonparticipants were asymptomatic, with opportunistic screening as the most frequent detection method (42%, 8/19 for ICs and 54%, 37/69 for non-participants). There were no differences in distribution of NPI prognostic categories across subgroups of asymptomatic invasive cancers (screening-detected cancers in the NBCSP, asymptomatic ICs and asymptomatic cancers in non-participants) or between subgroups of symptomatic invasive cancers (symptomatic ICs and symptomatic cancers in non-participants). Asymptomatic cancers had a significantly more favourable distribution of NPI prognostic categories compared with symptomatic cancers (P , 0.001). The proportion of invasive cancers with excellent/good NPI was 53% (164/310) for all asymptomatic and 25% (52/211) for all symptomatic invasive cancers. Conclusions A considerable percentage of breast cancers detected outside the organized screening programme were asymptomatic, with a prognostic profile comparable with screening-detected breast cancers in the NBCSP. Individual data regarding the detection method for all breast cancers are needed for a complete evaluation of the organized screening programme in Norway.

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Data quality at the Cancer Registry of Norway: An overview of comparability, completeness, validity and timeliness

Cited by 728 publications

References 18 publications

Measured cardiorespiratory fitness and self‐reported physical activity: associations with cancer risk and death in a long‐term prospective cohort study

Measured cardiorespiratory fitness and self‐reported physical activity: associations with cancer risk and death in a long‐term prospective cohort study

Long‐term stability of serum components in the Janus Serum Bank

Asymptomatic Breast Cancer in Non-Participants of the National Screening Programme in Norway: A Confounding Factor in Evaluation?

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