Macular thickness, as measured by OCT, is one of the key outcome measures used in most clinical trials, especially those on diabetic macular edema and AMD. Because Stratus TD-OCT was the most common commercially available OCT instrument in the past decade, most trials are designed based on Stratus OCT.
A percentile (or a centile) is a measure used in statistics indicating the value below which a given percentage of observations in a group of observations fall. For example, the 20th percentile is the value (or score) below which 20% of the observations may be found. The term percentile and the related term percentile rank are often used in the reporting of scores from norm-referenced tests.
The Gini coefficient (also known as the Gini index or Gini ratio) is a measure of differences in income.It was developed by the Italian statistician Corrado Gini in 1912.he Gini coefficient is usually a number between 0 and 1 (or 0 to 100). 0 means a country the income is equally distributed. On the other hand, 1 means that one person owns everything but the rest own nothing.