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Related to plaque index: Gingival Index, bleeding index


Statistical composite that measures changes in the economy or in financial markets, often expressed in percentage changes from a base year or from the previous month. Indexes measure the ups and downs of stock, bond, and some commodities markets, in terms of market prices and weighting of companies in the index.
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A statistical measure of the value of a certain portfolio of securities. The portfolio may be for a certain class of security, a certain industry, or may include the most important securities in a given market, among other options. The value of an index increases when the aggregate value of the underlying securities increases, and decreases when the aggregate value decreases. An index may track stocks, bonds, mutual funds, and any other security or investment vehicle, including other indices. An index's value may be weighted; for example, securities with higher prices or greater market capitalization may affect the index's value more than others. One of the most prominent examples of an index is the Dow Jones Industrial Average, which is weighted for price and tracks 30 stocks important in American markets.
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The relative value of a variable in comparison with itself on a different date. Many security price indicators such as the Standard & Poor's series and the New York Stock Exchange series are constructed as indexes. Also called stock index. See also base period.


To adjust a variable by a selected measure of relative value. For example, it has been proposed that an investor's basis on a security be indexed for changes in consumer prices so that only real increases in value will be taxed. Also called tax indexing. See also subindex.
Wall Street Words: An A to Z Guide to Investment Terms for Today's Investor by David L. Scott. Copyright © 2003 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. All rights reserved.


An index reports changes up or down, usually expressed as points and as a percentage, in a specific financial market, in a number of related markets, or in an economy as a whole.

Each index -- and there are a large number of them -- measures the market or economy it tracks from a specific starting point. That point might be as recent as the previous day or many years in the past.

For those reasons, indexes are often used as performance benchmarks against which to measure the return of investments that resemble those tracked by the index.

A market index may be calculated arithmetically or geometrically. That's one reason two indexes tracking similar markets may report different results. Further, some indexes are weighted and others are not.

Weighting means giving more significance to some elements in the index than to others. For example, a market capitalization weighted index is more influenced by price changes in the stock of its largest companies than by price changes in the stock of its smaller companies.

Dictionary of Financial Terms. Copyright © 2008 Lightbulb Press, Inc. All Rights Reserved.


(1) A statistical indicator that measures changes in the economy in general or in particular areas.An example is the cost-of-living index.(2) A reference point against which measurements are taken for purposes of making future adjustments.An adjustable-rate mortgage might begin with an interest rate of 6 percent and provide that it will increase or decrease in a like percentage as the increase or decrease between today's quoted price for 10-year U.S.Treasury bonds and the price on the loan's annual anniversary date.We would say that 10-year T-bonds are the index.

Some leading loan indices include

• Wall Street Journal prime
• Federal discount rate
• Fed funds rate
• 11th District Cost of Funds
• 10-year Treasuries
• One-year LIBOR

The Complete Real Estate Encyclopedia by Denise L. Evans, JD & O. William Evans, JD. Copyright © 2007 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Apart from the smears, it comprised also API according to Lange, Gingival Index (GI), and Orthodontic Plaque Index (OPI) upon first examination and after 35 days of using a toothpaste with propolis and CT gel.
Total plaque index for first-year students (7.94[+ or -]0.72) was significantly lower than for sixth-year students (9.13[+ or -]0.77).
A noninferiority trial was planned by hypothesizing a margin of clinical relevance in the plaque index (PI) reduction of 10%, which was set on the basis that a value of 20% of the plaque index is the clinically relevant level that indicates good oral hygiene.
Mouth hygiene was assessed for dental plaque index, tartar, gum disease and tooth loss.
Pre and post-operative plaque Index (PI) and gingival index (GI) were assessed to know the severity of inflammation following the standard procedures (24,25).
The goals for the 1990s state that the health situation will be improved by reducing manutrition by 20%, nutritional anemia by 40%, and gingivitis and calculus by 20%, by achieving a dental plaque index under 1.0, and by extending coverage of health education to 80% of schools in China.
The oral health indices including gingival index, plaque index, calculus index, mobility index, CAL and PPD, were significantly higher in cases (all Ptrend<0.001).
The Plaque Index System by Silness and Loe, P1I, uses the same teeth and "scoring units" as the gingival index (GI) by Loe and Silness; that is, the distal-facial, facial, mesial-facial, and lingual surfaces of each tooth.
Clinical examinations and measurements were done before and after treatment, using the plaque index (PI),7 the gingival index (GI),8 periodontal probing depths (PPD) of the teeth.
Students with open carious lesions, poor plaque scores (plaque index scores of >2), (12) severe gingivitis (gingival index score >2), (12) throat infections, irregular brushing frequency, as well as those unwilling to use a charcoal toothbrush, those using mouthwash and/or antibacterial toothpastes, smokers or those medically compromised were excluded from the study.