Most private insurers do not insure against the peril of flood due to the prevalence of adverse selection, which is the purchase of insurance by persons most affected by the specific peril of flood.

The disease is named after the British ophthalmologist Waren Tay, who in 1881 first described a symptomatic red spot on the retina of the eye, and after the American neurologist Bernard Sachs of Mount Sinai Hospital, New York, who described in 1887 the cellular changes of Tay – Sachs disease and noted an increased disease prevalence in the Eastern European Ashkenazi Jewish population.

Between 0. 4 % and 3. 8 % of children ages 5 to 18 may have Tourette's ; the prevalence of transient and chronic tics in school-age children is higher, with the more common tics of eye blinking, coughing, throat clearing, sniffing, and facial movements.

Owing to the high prevalence of cataracts, cataract extraction is the most common eye surgery.

Those with lighter iris color have been found to have a higher prevalence of age-related macular degeneration ( ARMD ) than those with darker iris color ; lighter eye color is also associated with an increased risk of ARMD progression.

The American Optometric Association released a statement supporting both objections, and the University of Waterloo released a statement expressing concern over the health regulation changes and presented academic literature indicating that these changes will significantly increase the prevalence of undetected eye diseases ultimately leading to vision loss.

Several of the Commonwealth nations followed the British lead and sourced buses from British manufacturers, leading to a prevalence of double-decker buses.

A 2006 study by Penn State's Center for Infectious Disease Dynamics indicated that reducing the deer population in small areas ( but not large areas ) may lead to higher tick densities, resulting in more tick-borne infections in rodents leading to a high prevalence of tick-borne encephalitis and creating a tick hot-spot.

The combination of longer life expectancy and aging populations in the developed world is expected to lead to an increase in GERD prevalence in the years to come.

It is hoped that the registry will provide information on the prevalence of ALS and lead to a better understanding of factors that may be associated with the disease.

However, social stigma, low health literacy and social taboos lead to under reporting which makes an accurate prevalence rate hard to determine.

The challenge in such an approach is that the disparate prevalence of ovarian cancer means that even testing with very high sensitivity and specificity will still lead to a number of false positive results ( i. e. performing surgical procedures in which cancer is not found intra-operatively ).

The day is further intended to draw global attention to the widespread prevalence of tobacco use and to negative health effects, which currently lead to 5. 4 million deaths worldwide annually.

The prevalence of these proteins on the metabolic pathways of most organisms lead some scientists to theorize that iron-sulfur compounds had a significant role in the origin of life in the Iron-sulfur world theory.

Calling the proposal a recipe for disaster which would create a " legal framework " to pardon, at will, anyone convicted of coup-related offence, party leader Mick Beddoes said on 16 May 2005 that it would lead to the prevalence of the law of the jungle and would licence any would-be political activist who wanted to engage in coups, to do so.

Often listing diagnoses without regard to incidence, prevalence, or relevant risk factors, websites may lead users to suspect rather rare and unlikely diseases as the source of their complaints.

The organization has assisted the USGS with a study concerning the effects of lead and pesticide exposure on fish-eating birds, as well as surveys of the prevalence of West Nile virus among birds in the region.

Though APLX keeps APL's extended character set, APLX is a bit more verbose, due to the prevalence of system functions with long names and the use of structured-control keywords.

") Since the 1970s, the prevalence of poststructuralist methods of criticism has resulted in students turning away from his work, although a number of scholars have recently returned to considering ' character ' as a historical category of evaluation ( for instance, Michael Bristol ).

Over time, the problems of maintaining continuity in such a free-flowing system, coupled with the growing prevalence of larps with closed gameworlds, led the LT to exert some control over the types of character permitted in the system.

African AIDS cases, though, have increased in the last three decades as HIV's prevalence has increased but as malnutrition percentages and poor sanitation have declined in many African regions.

According to the 2011 UNAIDS Report, HIV prevalence has declined among pregnant women attending antenatal clinics, young people ( ages 15 – 24 years ) and men in the general population.

The prevalence of single-square ch in crosswords declined somewhat with the widespread use of computers in the Czech Republic.

The prevalence of Acute Rheumatic Fever and Sydenham's Chorea has declined progressively in developed countries over the last decades.

The use of spacer GIFs has declined due to the prevalence of Cascading Style Sheets ( CSS ) for laying out web pages, which achieves the same effect by changing the margin or padding on a given element.

In specific wetlands that have historically exhibited a high prevalence of infection and malformations, several amphibian species have notably declined or disappeared ( see Johnson and McKenzie 2008 for review ).

The prevalence of sexual activity declined with age ( 73 % among respondents who were 57 to 64 years of age, 53 % among respondents who were 65 to 74 years of age, and 26 % among respondents who were 75 to 85 years of age ); women were significantly less likely than men at all ages to report sexual activity.

According to the Bureau of Justice Statistics from 2000 to 2008 the rate of prevalence of incarceration for blacks declined to 3, 161 per 100, 000 and the white rate slightly increase to 487 per 100, 000.

In 1999, Hwang starred in a short film by Greg Pak called Asian Pride Porn, which combined humor and serious social commentary to parody the Asian fetish and the prevalence of Asian fetish pornography.

The film covers about thirty years of Munch's life, focusing on the influences that shaped his art, particularly the prevalence of disease and death in his family and his youthful affair with a married woman.

The film addresses education reform in China, the economic gap between urban and rural populations, and the prevalence of bureaucracy and authority figures in everyday life.

The film focuses on the lack of communication between teenagers and their parents, and the prevalence of prescription drugs in American society.

It was Lippert's insistence on an American star in the Hammer films he was to distribute that led to the prevalence of American leads in so many of the company's productions during the 1950s.

Mass treatment campaigns in the 1950s reduced the worldwide prevalence from 50 – 150 million to fewer than 2. 5 million ; however during the 1970s there were outbreaks in south-east Asia and there have been continued sporadic cases in South America.

The severity of this type of fog was exacerbated in the late 1940s and 1950s by the prevalence of carbon and other smoke particles in the air from coal burning heating and power generation.

For example, Jin Yong and Gu Long, their wuxia novels directly led to the prevalence of wuxia period films.

The prevalence of bulls-eye cancellations varies considerably by country and time period.

" Period prevalence " is the proportion of a population that has the condition at some time during a given period (" 12-month prevalence ", etc ), and includes people who already have the condition at the start of the study period as well as those who acquire it during that period.

Often, a 12-month prevalence ( or some other type of " period prevalence ") is used in conjunction with lifetime prevalence.

In demographic studies which estimate the prevalence of infertility it is common to use a period of five years.

It is distinct from morbidity rate, which refers to the number of individuals in poor health during a given time period ( the prevalence rate ) or the number of newly appearing cases of the disease per unit of time ( incidence rate ).

The increased prevalence of cul-de-sac streets occurred in the 1960s and ' 70s, a period of rapid economic and city expansion, when a detached house on a large lot meant an ideal form of habitation ; overlooking the potential negative externalities.

During this period he gained a reputation as one of the few true scholars who was able to debate the growing prevalence of Modernist theology whilst maintaining an evangelical stance.

Some believe that the continued prevalence of depictions of these animals, especially in the later Han period, was an attempt by humans to " fit into " their understanding of their world.

More tellingly, the figures presented by Parker to sustain his idea about the growth of armies have been severely criticised by David Eltis as lacking consistency and David Parrott has proved that the period of the trace italienne did not show any significant growth in the size of French armies and that the late period of the Thirty Years War showed an increase in the proportion of cavalry in the armies, contrary to Parker's Thesis that the prevalence of siege warfare marked a decrease of its importance.

In tandem with this, Tlacaelel is said to have increased the level and prevalence of human sacrifice, particularly during a period of natural disasters that started in 1446 ( according to Durán ).

In a June 2007 interview, Green said that gaming magazines were in a " period of transition ", as the increasing prevalence of the Internet meant that print was no longer the primary source of information for enthusiasts.

Enevoldson collected evidence on the location, prevalence, and strength of stratospheric mountain waves during the period, 1992-1998.

The early historical period was also distinguished by the prevalence of slavery, caste system, decline in the status of women and untouchables under the sanction of the state and the Dharma Shastras.

The techniques for decompression after a period of working in a high pressure atmosphere had not been perfected at this time and – also owing to the prevalence of workers refusing to go through the decompression sequence given the length of time required ( around an hour ) – there were a number of cases of decompression sickness diagnosed as a result, resulting in two fatalities.

In this period the team missed an opportunity to move the entire effort to the Midlands where, due to the prevalence of British motor companies, the team would have benefited from greater and more convenient technical and engineering support, instead the team remained at The Maltings at Bourne.