Evidence map›Paper›PMID 34075066›Full record

ArticleScientific reports2021

High-throughput phenotyping methods for quantifying hair fiber morphology.

Tina Lasisi, Arslan A Zaidi, Timothy H Webster, Nicholas B Stephens, Kendall Routch, Nina G Jablonski, Mark D Shriver

Abstract read
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed, 1 pooled it
–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

5 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. A Comprehensive Review of GWASs of Human Hair Traits.The Journal of investigative dermatology · 2025
    Review
  4. Article
  5. Article
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.

Tina LasisiDepartment of Anthropology, Pennsylvania State University, Philadelphia, USA. tpl5158@psu.edu.
Arslan A ZaidiDepartment of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA.
Timothy H WebsterDepartment of Anthropology, University of Utah, Salt Lake City, USA.
Nicholas B StephensDepartment of Anthropology, Pennsylvania State University, Philadelphia, USA.
Kendall RoutchDepartment of Anthropology, Pennsylvania State University, Philadelphia, USA.
Nina G JablonskiDepartment of Anthropology, Pennsylvania State University, Philadelphia, USA.
Mark D ShriverDepartment of Anthropology, Pennsylvania State University, Philadelphia, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Quantifying the continuous variation in human scalp hair morphology is of interest to anthropologists, geneticists, dermatologists and forensic scientists, but existing methods for studying hair form are time-consuming and not widely used. Here, we present a high-throughput sample preparation protocol for the imaging of both longitudinal (curvature) and cross-sectional scalp hair morphology. Additionally, we describe and validate a new Python package designed to process longitudinal and cross-sectional hair images, segment them, and provide measurements of interest. Lastly, we apply our methods to an admixed African-European sample (n = 140), demonstrating the benefit of quantifying hair morphology over classification, and providing evidence that the relationship between cross-sectional morphology and curvature may be an artefact of population stratification rather than a causal link.

Indexed as

Image Processing, Computer-AssistedScalpCross-Sectional StudiesHairHumans

Identifiers

PMID34075066
PMCPMC8169905

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.