The Use of the Transient Elastography Paediatric Probe, Compared to the M Probe, Indirect Biomarkers and Histology
NCT ID: NCT04380493
Last Updated: 2020-05-11
Study Results
Results pending
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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Recruitment Status
COMPLETED
Total Enrollment
141 participants
Study Classification
OBSERVATIONAL
Study Start Date
2015-05-31
Study Completion Date
2019-12-31
Brief Summary
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The purpose of this study is to assess the reliability, reproducibility and accuracy of the paediatric probe of transient elastography in detecting liver fibrosis in children, besides its limitations and side effects. At the same time, to assess whether indirect fibrosis markers are a valid tool to detect absence or mild fibrosis in paediatric patients
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Detailed Description
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A retrospective cohort study, including all patients younger than 18 years of age with chronic liver disease who underwent a transient elastography, was performed. The study was carried out in the joint Unit of Paediatric Complex Hepatology and Liver Transplant, encompassing two third level paediatric hospitals, between 2015 and 2019. The study protocol was approved by local ethic committee (identifier code: PR(AMI)147/2019) and informed consent was signed by patient's legal guardians and patients over 16 years old.
Liver stiffness was assessed with FibroScan® (Echosens, France, model 502, class IIa, year 2010), which was performed by an experienced operator to avoid interobserver bias and in the same standardized conditions (fasting, decubitus position, right arm in maximal abduction, transducer placed over the right lobe). S probe (model 8; 5 MHz; diameter 5 mm), that measures depths ranging from 15-50 mm (S1: 15-40 mm; S2: 20-50 mm), was selected if chest circumference (CC) \< 75 cm (S1: ≤ 45 cm; S2: 45-75 cm). M probe (3.5 MHz; diameter 7 mm), measuring depths range 35-75mm, was used if CC ≥ 75 cm. Both probes met the calibration terms. Elastographic parameters studied were: stiffness (KPa), interquartile range (IQR) and success rate (SR). Adult-validated liver stiffness measurement ranges to classify the fibrosis degree were taken as a reference: F0-F1 (≤7.6 KPa), F2 (7.7-9.4 KPa), F3 (9.5-14 KPa) and F4 (\>14 KPa). The examination was successful when the median of at least 10 valid values, had a SR higher than 60% and with an IQR/LSM lower than 30%.
The following sociodemographic, clinical and analytical data were collected: age, sex, underlying liver disease and analytical parameters (alanine aminotransferase (ALT) U/L, aspartate aminotransferase (AST) U/L, gamma glutamyl transferase (GGT) U/L, total bilirubin (mg/dl), cholesterol (mg/dl), platelets (109/L), prothrombin time (%)). The following liver fibrosis test Scores were calculated using the obtained data:
* Fibrosis 4 Score (FIB-4) = Age (years) x AST (U/L) / platelets (109/L) x √ALT (U/L).
* AST to Platelet Radio Index (APRI) = AST (upper normal limit) (UI/l)/ platelets x 109 x 100.
Eighteen clinically indicated liver biopsies were performed and staged according METAVIR score (F0-F4). Blood test, fibrosis scores and biopsies were performed within 6 months of transient elastography. No clinical or analytical changes were observed during this period.
The Faces Pain Scale was used for assessing pain severity. Statistical analysis: Kolmogorov-Smirnov test checked out if variables followed a normal distribution. Continuous variables are presented as mean ± standard deviation or median (interquartile range) and categorical variables as number of subjects and percentage. Correlation between continuous variables were calculated using Pearson's and Spearman's correlation coefficient. The variance's analysis (ANOVA) and the Kruskal Wallis test were used to compare qualitative with quantitative variables. Two-tailed p-Values of \<0.05 were considered as statistically significant. Sensitivity, specificity, positive predictive value and negative predictive value were calculated in the assessment of FIB-4 and APRI as a diagnostic test to detect absence or mild fibrosis (F0-F1), using the results obtained by TE as a reference. The statistical analyses were performed with SPSS software (v. 21, SPSS Inc., Chicago, IL, USA) and Prism (v. 7.04 GraphPad Software Inc.).
Liver stiffness was assessed with FibroScan® (Echosens, France, model 502, class IIa, year 2010), which was performed by an experienced operator to avoid interobserver bias and in the same standardized conditions (fasting, decubitus position, right arm in maximal abduction, transducer placed over the right lobe). S probe (model 8; 5 MHz; diameter 5 mm), that measures depths ranging from 15-50 mm (S1: 15-40 mm; S2: 20-50 mm), was selected if chest circumference (CC) \< 75 cm (S1: ≤ 45 cm; S2: 45-75 cm). M probe (3.5 MHz; diameter 7 mm), measuring depths range 35-75mm, was used if CC ≥ 75 cm. Both probes met the calibration terms. Elastographic parameters studied were: stiffness (KPa), interquartile range (IQR) and success rate (SR). Adult-validated liver stiffness measurement ranges to classify the fibrosis degree were taken as a reference: F0-F1 (≤7.6 KPa), F2 (7.7-9.4 KPa), F3 (9.5-14 KPa) and F4 (\>14 KPa). The examination was successful when the median of at least 10 valid values, had a SR higher than 60% and with an IQR/LSM lower than 30%.
The following sociodemographic, clinical and analytical data were collected: age, sex, underlying liver disease and analytical parameters (alanine aminotransferase (ALT) U/L, aspartate aminotransferase (AST) U/L, gamma glutamyl transferase (GGT) U/L, total bilirubin (mg/dl), cholesterol (mg/dl), platelets (109/L), prothrombin time (%)). The following liver fibrosis test Scores were calculated using the obtained data:
* Fibrosis 4 Score (FIB-4) = Age (years) x AST (U/L) / platelets (109/L) x √ALT (U/L).
* AST to Platelet Radio Index (APRI) = AST (upper normal limit) (UI/l)/ platelets x 109 x 100.
Eighteen clinically indicated liver biopsies were performed and staged according METAVIR score (F0-F4). Blood test, fibrosis scores and biopsies were performed within 6 months of transient elastography. No clinical or analytical changes were observed during this period.
The Faces Pain Scale was used for assessing pain severity. Statistical analysis: Kolmogorov-Smirnov test checked out if variables followed a normal distribution. Continuous variables are presented as mean ± standard deviation or median (interquartile range) and categorical variables as number of subjects and percentage. Correlation between continuous variables were calculated using Pearson's and Spearman's correlation coefficient. The variance's analysis (ANOVA) and the Kruskal Wallis test were used to compare qualitative with quantitative variables. Two-tailed p-Values of \<0.05 were considered as statistically significant. Sensitivity, specificity, positive predictive value and negative predictive value were calculated in the assessment of FIB-4 and APRI as a diagnostic test to detect absence or mild fibrosis (F0-F1), using the results obtained by TE as a reference. The statistical analyses were performed with SPSS software (v. 21, SPSS Inc., Chicago, IL, USA) and Prism (v. 7.04 GraphPad Software Inc.).
Conditions
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Elastography
Fibrosis, Liver
Pediatrics
Chronic Liver Disease
Study Design
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Observational Model Type
COHORT
Study Time Perspective
RETROSPECTIVE
Interventions
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hepatic transient elastography using S probe and M probe
Intervention Type
DIAGNOSTIC_TEST
Other Intervention Names
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Compare results with liver biopsy
Calculate indirect fibrosis markers (APRI and FIB-4)
Eligibility Criteria
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Inclusion Criteria
* Patients younger than 18 years of age with chronic liver disease who underwent a transient elastography.
* Parents / legal guardians and the patients themselves, if applicable, have read, understood and signed the informed consent of the study.
* Parents / legal guardians and the patients themselves, if applicable, have read, understood and signed the informed consent of the study.
Maximum Eligible Age
18 Years
Eligible Sex
ALL
Accepts Healthy Volunteers
No
Sponsors
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Hospital Vall d'Hebron
OTHER
Sponsor Role
lead
Responsible Party
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Jesús Quintero
Pediatric Hepatologist, physician
Responsibility Role
PRINCIPAL_INVESTIGATOR
Locations
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Hospital Vall d'Hebron
Barcelona, , Spain
Site Status
Countries
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Spain
References
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Other Identifiers
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PR(AMI)147/2019
Identifier Type: -
Identifier Source: org_study_id
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