Evidence map›Paper›PMID 33842935›Full record

ArticleThe British journal of surgery2021

Mortality after surgery for primary hyperparathyroidism: results from a nationwide cohort.

M Nilsson, K Ivarsson, M Thier, E Nordenström, A Bergenfelz, M Almquist

Abstract readMulticenter Study
In one paragraph

Article in The British journal of surgery, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

5 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

M NilssonDepartment of Surgery, Skåne University Hospital, Lund, Sweden.ORCID 0000-0002-5568-0643
K IvarssonDepartment of Clinical Sciences, Lund University, Lund, Sweden.
M ThierDepartment of Surgery, Skåne University Hospital, Lund, Sweden.
E NordenströmDepartment of Surgery, Skåne University Hospital, Lund, Sweden.
A BergenfelzDepartment of Surgery, Skåne University Hospital, Lund, Sweden.ORCID 0000-0002-8355-6025
M AlmquistDepartment of Surgery, Skåne University Hospital, Lund, Sweden.ORCID 0000-0002-0953-1188

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundContemporary patients with primary hyperparathyroidism are often diagnosed with mildly raised serum calcium levels. Previous studies have reported increased mortality in patients with primary hyperparathyroidism. This retrospective cohort study aimed to examine whether contemporary patients operated for primary hyperparathyroidism have higher mortality than the general population, and whether mortality in these patients is associated with serum calcium concentration, adenoma weight or multiglandular disease.

methodsPatients from a Swedish national cohort consisting of patients registered in the Scandinavian Quality Register for Thyroid, Parathyroid, and Adrenal Surgery 2003-2013, were matched with population controls. The National Patient Register, the Swedish Cause of Death Register, and socioeconomic data were cross-linked. End of follow-up was 10 years after surgery, 31 December 2015, or emigration. Mortality was analysed by standardized mortality ratio, Kaplan-Meier survival estimates, and univariable and multivariable Cox regression. Multiple imputation by chained equations was performed on missing data.

resultsAfter exclusions, there were 5009 patients with primary hyperparathyroidism and 14 983 controls. Multivariable Cox regression analysis adjusted for age, sex, Charlson Co-morbidity Index, marital status, level of education, disposable income, and period of surgery showed lower mortality in patients than controls (hazard ratio (HR) 0.83, 95 per cent c.i. 0.75 to 0.92). In univariable Cox regression of mortality in patients, serum calcium concentration (mmoles per litre) was associated with mortality (HR 2.20, 1.53 to 3.16). This association remained in multivariable Cox regression after multiple imputation (HR 1.79, 1.19 to 2.70).

conclusionMortality was not increased in patients operated for primary hyperparathyroidism compared with controls in a contemporary setting. Preoperative serum calcium concentration might, however, influence survival.

Indexed as

Population SurveillanceRegistriesRisk AssessmentBiomarkersCalciumCause of DeathFemaleFollow-Up StudiesHumansHyperparathyroidism, PrimaryMaleMiddle AgedPostoperative PeriodRetrospective StudiesRisk FactorsSurvival RateBiomarkersCalcium

Identifiers

PMID33842935
PMCPMC10364903

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.