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.
32% -- 32 for each 100. If we think of a quantity being divided into one hundred equal parts, that is, into hundredths, then a percent is a number of hundredths. 32% is 32 hundredths. When the percent is less than or equal to 100%, then we can say out of 100. 32% is 32 out of 100.