Trial · NCT07906067
Laser Height Measuring Device Study in Vietnam
NCT07906067, Completed, World Vision US
3 sourcestrials-2026-11-12-0.5.0
Cite this record
ConductScience Library. Laser Height Measuring Device Study in Vietnam. Trials, record NCT07906067. Release trials-2026-11-12-0.5.0, 12 Nov 2026. https://conductscience.org/library/trials/NCT07906067
On this page
Trial
As registered on ClinicalTrials.gov, in the graph's capture of the registry.
- Title
- Laser Height Measuring Device Study in Vietnam
- NCT number
- NCT07906067
- Status
- Completed
- Enrollment
- 571 participants, actual
- Lead sponsor
- World Vision US
- Conditions
- Child Malnutrition, Wasting Syndrome, Stunting
- Interventions
- Laser Height/Length Measuring Device, ShorrBoard
- First posted
- 2026-10-30
- Last updated
- 2026-10-30
Source ClinicalTrials.gov
Registered outcomes16
Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.
| List | Outcome | Time frame | Description |
|---|---|---|---|
| Primary | Accuracy and equivalence of laser height/length measurements compared with the ShorrBoard | Day 1 | The mean paired difference in height/length measurements (cm) between the laser device and conventional ShorrBoard when operated by expert measurers. Equivalence will be assessed using the Two One-Sided Tests (TOST) procedure with a prespecified equivalence margin of ±0.2 cm and a significance level of 0.05. Equivalence will be established if the entire 90% confidence interval of the mean paired difference falls within -0.2 to +0.2 cm. |
| Primary | Intra-observer measurement precision (Technical Error of Measurement, TEM) | Day 1 | Measurement precision will be evaluated using TEM, calculated from repeated height/length measurements obtained with each device by expert measurers and community volunteers. Two measurements will be obtained initially. If the difference exceeds 0.7 cm, a third measurement will be taken, and the two closest readings will be retained. TEM will be calculated as √\[Σ(d²)/(2n)\] and reported in centimetres and millimetres. The expert ShorrBoard TEM must be less than 0.4 cm to qualify as an acceptable reference measurement process. |
| Primary | Agreement between laser device and ShorrBoard height/length measurements | Day 1 | Agreement between the two devices will be evaluated using Bland-Altman analysis, including mean measurement bias and 95% limits of agreement (mean paired difference ±1.96 standard deviations). Results will be expressed in centimetres and presented overall and separately by measurer cadre. |
| Primary | Reliability and concordance of height/length measurements | Day 1 | Agreement between measurements obtained using the laser device and ShorrBoard will be evaluated using the intraclass correlation coefficient for absolute agreement (ICC\[A,1\]) and Lin's concordance correlation coefficient (CCC). These statistics will quantify the consistency and concordance of measurements between devices. |
| Secondary | Measurement accuracy by measurer cadre | Day 1 | The mean paired difference between laser and ShorrBoard measurements will be calculated separately for expert measurers and community volunteers to determine whether device accuracy differs according to measurer experience. |
| Secondary | Differences between expert and community volunteer measurements | Day 1 | The mean differences in height/length measurements between expert measurers and community volunteers will be evaluated separately for the laser device and ShorrBoard to assess measurer-related systematic bias. |
| Secondary | Device-by-measurer interaction | Day 1 | A linear mixed-effects model will assess whether the difference between laser and ShorrBoard measurements varies by measurer cadre. The interaction will be quantified as the difference between the volunteer and expert laser-minus-ShorrBoard contrasts. |
| Secondary | Differences in anthropometric z-scores | During a single study visit; repeated measurements with both devices are obtained at least 30 minutes apart | Differences in height-for-age/length-for-age (HAZ/LAZ) and weight-for-height/weight-for-length (WHZ/WLZ) z-scores derived from laser and ShorrBoard measurements will be calculated using WHO 2006 Child Growth Standards. |
| Secondary | Agreement in stunting classification | Day 1 | Agreement in classifying children as stunted (HAZ/LAZ \<-2) or severely stunted (HAZ/LAZ \<-3) will be compared between devices using cross-tabulations, Cohen's kappa, and McNemar's test. |
| Secondary | Agreement in wasting classification | Day 1 | Agreement in classifying children as wasted (WHZ/WLZ \<-2) or severely wasted (WHZ/WLZ \<-3) will be compared between devices using cross-tabulations, Cohen's kappa, and McNemar's test. |
1 to 10 of 16Source ClinicalTrials.gov
See all 16 registered outcomesOutcomes0
Each outcome the trial posted results for, in ClinicalTrials.gov's words.
None in this release.
Results by group0
Each measurement the trial posted, group by group, in the words and numbers it posted.
None in this release.
Participant flow0
How many started, completed or left each group, period by period.
None in this release.
Adverse events0
Each adverse event the trial posted, group by group: the participants affected out of those at risk.
None in this release.
Adverse event totals0
The totals the trial posted for each group.
None in this release.
Papers0
The papers the trial lists on ClinicalTrials.gov.
None in this release.
Grants0
The grants NIH RePORTER links to the trial, newest funded first: NIH's, and some of AHRQ's, CDC's, FDA's and VA's. Each shows its title, principal investigators, organization and funder in its newest year.
None in this release.
Trial comparisons0
Comparisons of the trial's two groups, calculated by ConductScience from the counts it posted.
None in this release.
Tests0
The ConductCognition tests this trial's registered outcomes name, as ScienceGraph matched them in trial-tests-2026-11-12-0.2.1.
None in this release.
Data dates
The day each source was copied for this release.
Sources 3
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
- NIH RePORTER's clinical studies and project filesPublic domain
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
- ClinicalTrials.govnone stated
- NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.
For software
Read this trial from software.
The record and each of its lists are JSON, twenty rows a page. No key.
GET https://conductscience.org/api/trials/v1/NCT07906067
GET https://conductscience.org/api/trials/v1/NCT07906067/registered