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.
1 A percent is the number of parts out of 100 of something. 2  For example, a quarter (25 cents) is 25 percent of a dollar (100 cents). 3  It is the numerator of a fraction whose denominator is 100. 4  So, the fraction 25/100 is 25. Percent. 2  A percent is the number of parts out of 100 of something. 3  For example, a quarter (25 cents) is 25 percent of a dollar (100 cents). 4  It is the numerator of a fraction whose denominator is 100.