Evidence map›Paper›PMID 31930179›Full record

ArticlePorto biomedical journal

Hypocalcemia in cancer patients: An exploratory study.

José António Ferraz Gonçalves, Telma Costa, Joana Rema, Cristina Pinto, Miguel Magalhães, Ana Esperança, Luciana Sousa

Open access · diamondAbstract read
In one paragraph

Article in Porto biomedical journal. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
1.6field-weighted citation impact, top 15% of its field
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

13 citing papers in PubMed, 31 citations in OpenAlex.

  1. Assessment of metal exposure in fingernails of patients with nasopharyngeal cancer: a case study in Vietnamese men.Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine · 2026
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  12. Preoperative Low Serum Calcium Levels Predict Poor Prognosis for Patients with Esophageal Cancer.Annals of thoracic and cardiovascular surgery : official journal of the Association of Thoracic and Cardiovascular Surgeons of Asia · 2022
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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

7 authors at 4 institutions in 1 country.

José António Ferraz GonçalvesInstituto Português de Oncologia, Porto, Portugal.
Telma CostaInstituto Português de Oncologia, Porto, Portugal.
Joana RemaCentro Hospitalar de S. João, Porto, Portugal.
Cristina PintoHospital de Faro, Faro, Portugal.
Miguel MagalhãesUSF Barão de Nova Sintra, Porto, Portugal.
Ana EsperançaUSF Mais Saúde, Ponte de Lima, Portugal.
Luciana SousaHospital de Braga, Braga, Portugal.
IPO Porto · PTHospital Braga · PTHospital de Faro EPE · PTHospital de São João · PT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionCalcium has several physiological functions and when it registers abnormal serum levels those functions may be impacted with potentially severe consequences. There is much research on hypercalcemia in cancer patients, but there are no recent studies on the prevalence of hypocalcemia in those patients. However, there has been an evolution in oncology, namely, new drugs that may directly or indirectly result in hypocalcemia. The primary aim was to explore the association of hypocalcemia with the diverse types of cancer. The secondary aim was to study the influence that hypocalcemia might have on survival.

methodsReview of the records of patients ≥18 years old, with total calcium <2.0 mmol/L measured in 2013 in a cancer center.

resultsEight hundred twenty-nine patients were included. Four hundred thirty-nine (53%) were male. The median age was 63 years. The most frequent cancer diagnoses were hematological 196 (24%) and colorectal 111 (13%). Six hundred thirty-eight patients had measured serum albumin, with a median of 25.5 g/L (14-47). When corrected for albumin level, calcium was in the normal range in 210 (33%) cases. The median survival of patients with corrected calcium lower than normal was 479 days (95% confidence interval [CI]: 309-649) and that of patients with normal corrected calcium was 62 days (95% CI: 33-91),

conclusionHypocalcemia is associated with several types of cancer. A low calcium level is not by itself a factor of a poor prognosis since other factors seem to be more important.

Indexed as

cancerhypocalcemiaprognosis

Identifiers

PMID31930179
PMCPMC6924975
OpenAlexW2964470370

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.