Inter-rater and Intra-rater Reliability of the Global Eyebrow Assessment Scale

This study evaluated the inter- and intra-rater reliability of the GEBA Scale with photonumeric guide for the assessment of overall eyebrow fullness. There is no treatment (intervention) associated with this study.

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Key information

Conditions

Healthy Volunteers

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Newport Beach, California, United States

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

Willing to remove makeup and jewelry at each visit
Willing to have photographs taken of the facial area

Exclusion criteria

Permanent eyebrow makeup (i.e., tattooing) or eyebrow implants of any kind
Eyebrow extension application within 3 months of study entry
Eyebrow tint or dye application within 2 months of study entry
Eyebrow grooming (i.e., tweezing, waxing, or threading) between visits that is not part of the current routine

Treatment and study plan

No intervention

Drug

No Intervention.

Primary outcomes

Inter-rater Reliability of Physician Raters Using the Global Eyebrow Assessment (GEBA) Scale

Time frame: Day 1

Inter-rater agreement (among raters) of the GEBA scores (1=very sparse, 2=sparse, 3=full, 4=very full) to assess eyebrow fullness was evaluated using Kendall's coefficient of concordance (Kendall's W). Each of 7 raters scored 112 subjects' eyebrows using the GEBA Scale 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 and 0.81-1:00: almost perfect. The 95% confidence interval for Kendall's W was provided.
Intra-rater Reliability of Physician Raters Using the Global Eyebrow Assessment (GEBA) Scale

Time frame: Day 1

Intra-rater (within raters) agreement of the GEBA scores (1=very sparse, 2=sparse, 3=full, 4=very full) to assess eyebrow fullness was evaluated by weighted Kappa statistics. Weighted Kappa statistics were calculated for each of 7 raters who evaluated 112 subjects using GEBA scale, 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 predefined as: ≤ 0: poor, 0.00-0.20: slightly, 0.21-0.40: fair, 0.41-0.60: moderate, 0.61-0.80: substantial and 0.81-1:00: almost perfect. The 95% confidence interval for Kappa statistics was provided.

Sponsors and collaborators

Lead sponsor

Allergan

Industry

Registry information

Important dates

Study start: 2011
Primary completion: 2011
Study completion: 2011
First posted: Aug 9, 2011
Registry last updated: Oct 29, 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