(redirected from plaque index)
Also found in: Dictionary, Thesaurus, Medical, Legal, Acronyms, Encyclopedia.
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.


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.


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.


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.


(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

References in periodicals archive ?
By analyzing the statistical data in CPI related samples per week, we observed a decrease in plaque index, adjusted to the active population in the sample (figure 3).
Moderate hyperplasia was detected in six patients--a prevalence rate of 10%, and association of amlodipine induce gingival hyperplasia with age , sex, duration of medication and plaque index were found to be statistically non-significant with p value>0.
Standardization of the community dental plaque index yielded concordance kappa values of 80%.
After initially selecting 56 patients (30 females, 26 males) who fulfilled all of the aforementioned criteria, 8 patients were still needed to comply with the sample size calculation of 64 subjects, based on the statistical parameters (minimal difference between plaque index mean values of 0.
Plaque index score: a 0-to-3 scale ranging from no plaque to an abundance of soft matter within the gingival pocket (the pocket of soft tissue between gum and tooth).
If they scored 1 on the plaque index, which indicates a film of plaque adhering to the free gingival margin adjacent to the tooth, they were eligible.
To compare the self-reported oral health behavior with the actual clinical situation of the participants, clinical parameters were measured using the following indices: Plaque index (Loe and Sillness 1967), [10] CPITN index (WHO 1977) [11] and OHI-S index (Greene and Vermillion 1960).
The Plaque Index was recorded by the same investigator throughout the period of study as described earlier.
8 5 PI = plaque index, GI = gingival index, BOP = bleeding on probing, MPD = mean pocket depth, MP=maximum pocket detected Table 2.
The clinical assessment measurements were plaque index, number of decayed, missing and filled surfaces (DMFS), as well as the 12 items of GOHAI.