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NCT05561920 · OUTCOME

The Measures of Central Tendency and Dispersion in Acoustic Signal - Relative Jitter and Shimmer

Phonatory Movement of the Pharyngoesophageal Mucosa in Laryngectomy Patients · Source last updated 2026-03-31

Results reported by the registry submitting party. Population, time horizon, units and missing values must be read together.

Measure
MEDIAN
Unit
percentage (%)
Interval / dispersion
Inter-Quartile Range
Time frame
15 minutes

What was measured

The acoustic analysis of the tracheoesophageal (TE) voice with a voice prosthesis was performed in a quiet room (ambient noise \< 50 dB) with a microphone placed 30 cm from the mouth to create optimal conditions for recording and analysis. Three consecutive measurements were taken. The voice recordings were analysed using the acoustic programme lingWAVES (Voice and speech analyser version 2.x software). The following parameters were recorded from the central part of the best recording: jitter (%), shimmer (%)

Groups in this outcome

Jitter and Shimmer

Patients who have undergone total laryngectomy and completed minimal their 6-month period without disease after surgery and post-operative treatments such as radiotherapy or chemotherapy Acoustic voice analysis: acoustic program (lingWAVES - Voice and speech analyser) - measuring the values of acoustic parameters in tracheoesophageal voice with voice prosthesis recordings

Group identifiers and denominators belong to this outcome only. They may differ in another outcome or in safety reporting.

Analysis denominator · Participants

GroupSource count
Jitter and Shimmer55

Reported measurements

Jitter
Values in percentage (%) · Interval/dispersion: Inter-Quartile Range
GroupValueSpreadLowerUpperComment
Jitter and Shimmer13.2Not reported10.915.4Not reported
Shimmer
Values in percentage (%) · Interval/dispersion: Inter-Quartile Range
GroupValueSpreadLowerUpperComment
Jitter and Shimmer43.9Not reported32.550.4Not reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        10.9
        upper Limit
        15.4
        value
        13.2
    title
    Jitter
  2. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        32.5
        upper Limit
        50.4
        value
        43.9
    title
    Shimmer
denoms
  1. counts
    1. group Id
      OG000
      value
      55
    units
    Participants
description
The acoustic analysis of the tracheoesophageal (TE) voice with a voice prosthesis was performed in a quiet room (ambient noise \< 50 dB) with a microphone placed 30 cm from the mouth to create optimal conditions for recording and analysis. Three consecutive measurements were taken. The voice recordings were analysed using the acoustic programme lingWAVES (Voice and speech analyser version 2.x software). The following parameters were recorded from the central part of the best recording: jitter (%), shimmer (%)
dispersion Type
Inter-Quartile Range
groups
  1. description
    Patients who have undergone total laryngectomy and completed minimal their 6-month period without disease after surgery and post-operative treatments such as radiotherapy or chemotherapy Acoustic voice analysis: acoustic program (lingWAVES - Voice and speech analyser) - measuring the values of acoustic parameters in tracheoesophageal voice with voice prosthesis recordings
    id
    OG000
    title
    Jitter and Shimmer
param Type
MEDIAN
reporting Status
POSTED
time Frame
15 minutes
title
The Measures of Central Tendency and Dispersion in Acoustic Signal - Relative Jitter and Shimmer
type
PRIMARY
unit Of Measure
percentage (%)

Download exact source JSON → · Snapshot ctgov-results-25a395029948b04d52b1253f

Preserved source evidence · Not medical advice