Inter-rater and Intra-rater Reliability Study of the Global Eyelash Assessment Scale for Assessment of Overall Eyelash Prominence

This study will evaluate the inter-rater and intra-rater reliability of the Global Eyelash Assessment (GEA) scale with photonumeric guide in Japanese subjects.

Completed

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Key information

Conditions

Healthy Volunteers

Age range

20 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Ueno, Tokyo, Japan

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Able and willing to remove all eye makeup and facial jewelry during study

Exclusion criteria

Permanent eyelid makeup or eyelash implants of any kind
Eyelash tint or dye application within 2 months
Eyelash extensions within 3 months

Treatment and study plan

No treatment

Other

No treatment (intervention) will be provided in this study

Primary outcomes

Overall Inter-Rater Reliability of Assessing Overall Eyelash Prominence Using the Japanese Global Eyelash Assessment Scale (GEA-J) at Day 1

Time frame: Day 1

Inter-rater agreement (among raters) of the GEA-J scores (1=minimum,2=moderate, 3=marked, 4=very marked) to assess eyelash prominence was evaluated using Kendall's coefficient of concordance (Kendall's W). Each of 7 raters who scored 68 subjects' eyelashes using GEA-J Scale with photonumeric guide at 2 different time points at day 1. The overall inter-rater agreement for Kendall's W for all raters combined was estimated based on the average of the scores from those 2 different time points. The degree of agreement of the point estimates of Kendall's W was interpreted according to the reference range scale that was pre-defined as: <=0: poor, 0.00-0.20: slightly, 0.21-0.40: fair, 0.41-0.60: moderate, 0.61-0.80: substantial, 0.81-1:00: almost perfect. The 95% confidence interval for Kendall's W is provided.
Overall Intra-Rater Reliability of Assessing Overall Eyelash Prominence Using the Japanese Global Eyelash Assessment Scale (GEA-J) at Day 1

Time frame: Day 1

Intra-rater (within raters) agreement of the GEA-J scores (1=minimum, 2=moderate, 3=marked, 4=very marked) to assess eyelash prominence was evaluated by weighted Kappa statistics. Weighted Kappa statistics were calculated for each of 7 rater who evaluated 68 subjects using GEA-J scale with photonumeric guide, assessing agreement between 2 different time points at day 1. The overall intra-rater agreement for Kappa statistics for all raters combined was estimated by pooling Kappa statistics for each rater using a chi-square statistic. The degree of agreement of the point estimates of Kappa statistics was interpreted according to the reference range scale that was pre-defined as: <=0: poor, 0.00-0.20: slightly, 0.21-0.40: fair, 0.41-0.60: moderate, 0.61-0.80: substantial, 0.81-1:00: almost perfect. The 95% confidence interval for Kappa statistics is provided.

Sponsors and collaborators

Lead sponsor

Allergan

Industry

Registry information

Important dates

Study start: 2010
Primary completion: 2010
Study completion: 2010
First posted: Dec 2, 2010
Registry last updated: Sep 28, 2012

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed