Evidence map›Paper›PMID 32436072›Full record

ArticleWorld journal of urology2021

Outcome groups and a practical tool to predict success of shock wave lithotripsy in daily clinical routine.

B Hirsch, D Abt, S Güsewell, J Langenauer, P Betschart, M Pratsinis, M W Vetterlein, H P Schmid, S Wildermuth, V Zumstein

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Article in World journal of urology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing 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

3 citing papers in PubMed.

  1. Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors.

B HirschDepartment of Urology, Kantonsspital St. Gallen, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland.
D AbtDepartment of Urology, Kantonsspital St. Gallen, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland.
S GüsewellBiostatistics, Clinical Trials Unit, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland.
J LangenauerDepartment of Urology, Kantonsspital St. Gallen, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland.
P BetschartDepartment of Urology, Kantonsspital St. Gallen, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland.
M PratsinisDepartment of Urology, Kantonsspital St. Gallen, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland.
M W VetterleinDepartment of Urology, University Medical Centre Hamburg-Eppendorf, Martinistrasse 52, 20247, Hamburg, Germany.
H P SchmidDepartment of Urology, Kantonsspital St. Gallen, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland.
S WildermuthDepartment of Radiology and Nuclear Medicine, Kantonsspital St. Gallen, 9007, St. Gallen, Switzerland.
V ZumsteinDepartment of Urology, Kantonsspital St. Gallen, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland. valentin.zumstein@gmail.com.ORCID http://orcid.org/0000-0002-7881-9134

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo improve outcome prediction of extracorporeal shock wave lithotripsy (SWL) by development of a model based on easily available clinical and radiographical predictors and suitable for daily clinical use. MATERIALS AND

methodsWe evaluated predictive factors for SWL success in 517 consecutive patients suffering from urinary calculi who underwent SWL between 2010 and 2018. Analyses included descriptive statistics, receiver operating characteristic statistics and logistic regression. Predictive value was improved by combining parameters using model selection and recursive partitioning.

resultsOf the 517 patients, 310 (60.0%) had a successful SWL. Best individual predictor of SWL success was mean attenuation (MAV), with an area under the curve (AUC) of 0.668, and an optimal cutpoint (OC) of 987.5 HU. The best multivariable model, including MAV, stone size, skin to stone distance (SSD), presence of an indwelling stent, and four interaction effects, yielded an AUC of 0.736. Recursive partitioning would categorize patients into three outcome groups with high (76.9%), intermediate (41%) and low (10%) success probability. High probability of SWL success (76.9%) was found for patients with a stone with MAV ≤ 987 HU or with MAV > 987 HU but stone size ≤ 11 mm and SSD (45°) ≤ 88 mm.

conclusionA model based on four established predictors, and provided as an Excel

Indexed as

LithotripsyAdolescentAdultAgedAged, 80 and overFemaleHumansMaleMiddle AgedModels, TheoreticalPrognosisRetrospective StudiesTreatment OutcomeUrinary CalculiYoung AdultCalculatorHounsfield unitsMean attenuation valuePredictorShock wave lithotripsyUrinary calculi

Identifiers

PMID32436072

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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.