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.
On the keyboard. The percent sign ( % ) is made on most American keyboards by holding the SHIFT key and pressing the number 5 on the top number line. The percent sign can also be made by choosing INSERT SYMBOL and selecting the % sign. Rules for using the percent sign. 1. In most writing, we use the percent sign ( % ) if a number is written as a numeral. A) In formal writing, numbers above nine are usually written as numerals. B) All numbers in charts, mathematics, science and technical documents are usually written as numerals. 25% of the children were male.