While K-Ar dating has been used extensively in the geological sciences, the prevalence of < sup > 40 </ sup > Ca in nature has impeded its use in dating.

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.

The prevalence of aggressive driving has resulted in the HKTD making it mandatory for Hong Kong minibuses to be equipped with large read-out speedometers which allow passengers to track the speed at which minibus drivers operate.

The family names, the predominant Catholic religion, the prevalence of Irish music – even the accents of the people – are so reminiscent of rural Ireland that Irish author Tim Pat Coogan has described Newfoundland as " the most Irish place in the world outside of Ireland ".

Due to the prevalence of American television programs and motion pictures in which the police characters frequently read suspects their rights, it has become an expected element of arrest procedure — in the 2000 Dickerson decision, Chief Justice William Rehnquist wrote that Miranda warnings had " become embedded in routine police practice to the point where the warnings have become part of our national culture.

The prevalence of memory leak bugs has led to the development of a number of debugging tools to detect unreachable memory.

This is at least partly attributed to the economic strain that additional children place on the family income, and has resulted in the prevalence of illegal abortions in the country, as well as use of other forms of birth control.

In recent years, the popularity and prevalence of midgets in wrestling has greatly decreased due to wrestling companies depriving midget divisions of storyline and / or feud.

Syringomyelia has a prevalence estimated at 8. 4 cases per 100, 000 people, with symptoms usually beginning in young adulthood.

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 large-scale prevalence of gang graffiti in some inner cities has almost made it acceptable to the societies based there – so much so that it may go unnoticed, or not be removed, possibly because it may be a fruitless endeavour, to be graffitied on once again.

In the United States, the prevalence ( frequency in the population ) of urolithiasis has increased from 3. 2 % to 5. 2 % from the mid-1970s to the mid-1990s.

The move toward single-dose treatment strategies has reduced the prevalence of disease in some regions, since prevalence is dependent on duration of treatment.

The prevalence of asthma has increased significantly since the 1970s.

The author of the series has stated that this was a deliberate reaction to the prevalence of renegade, non-evil drow characters.

It has a prevalence that ranges between 2 and 150 per 100, 000.

The hygiene hypothesis has received more support than the prevalence hypothesis.

Findings on the relationship between TBI severity and prevalence of subsequent psychiatric disorders have been inconsistent, and occurrence has been linked to prior mental health problems as well as direct neurophysiological effects, in a complex interaction with personality and attitude and social influences.

However the theory has been criticized because symptoms which would be typical of such effects are rare compared with prevalence of homosexuality

Of those with fragile X syndrome, prevalence of concurrent autism spectrum disorder ( ASD ) has been estimated to be between 15 and 60 %, with the variation due to differences in diagnostic methods and the high frequency of autistic features in individuals with fragile X syndrome not meeting the DSM criteria for an ASD.

It has been found that 32 % and 51 % of individuals with schizophrenia meet criteria for metabolic syndrome ; the prevalence is higher in women than in men.

Because Tay – Sachs was one of the first genetic disorders for which widespread genetic screening was possible, it is one of the first genetic disorders in which the prevalence of compound heterozygosity has been demonstrated.

Extensive research has produced mathematical models of sexual behavior comparing the results generated with the observed prevalence of sexually transmitted infections ( STIs ) to statistically estimate the probable sexual behavior of the studied population.

Although the local distribution of clouds can be significantly influenced by topography, the global prevalence of cloud cover tends to vary more by latitude.

The majority of research on conduct disorder suggests that there are a significantly greater number of males than females with the diagnosis, with some reports demonstrating a three-to-fourfold difference in prevalence.

Existing definitions of infertility lack uniformity, rendering comparisons in prevalence between countries or over time problematic, and therefore data estimating the prevalence of infertility cited by various sources differs significantly.

A study by Sernyak and colleagues found that the prevalence of diabetes in atypical antipsychotic treatments was statistically significantly higher than that of conventional treatment.

However, more recent epidemiological studies have placed the occurrence rate at closer to 1 in every 7, 500 live births, a significantly larger prevalence.

Conversely, other studies dispute these claims and report that the prevalence rate has not significantly decreased with the use of more expensive antipsychotic medication.

The prevalence of compulsive hoarding in the community has been estimated at between two and five percent, significantly higher than the rates of OCD and other disorders, such as panic disorder and schizophrenia.

The prevalence of residential water metering varies significantly worldwide.

The pneumatic hammer drill was introduced in 1897 and sandblasting was introduced in about 1904, both significantly contributing to the increased prevalence of silicosis.

It is worth noting that no causal link has been demonstrated between sarcomas and vaccination, that no statistical difference has been shown between prevalence of Sarcomas in those animals vaccinated with adjuvented or unadjuvented vaccines, and that the occurrence of sarcomas is significantly lower in Europe and Great Britain than the USA regardless of the use of similar vaccines.

Research on the trends in use of heavy vehicles indicate that a significant difference between the U. S. and other countries is the relatively high prevalence of pickup trucks and SUVs in the U. S. A 2003 study by the U. S. Transportation Research Board found that SUVs and pickup trucks are significantly less safe than passenger cars, that imported-brand vehicles tend to be safer than American-brand vehicles, and that the size and weight of a vehicle has a significantly smaller effect on safety than the quality of the vehicle's engineering.

Women had significantly higher prevalence rates of agoraphobia and simple phobia, however there were no differences, found between men and women, in social phobia.

The prevalence of commodity speculation in modern capitalism significantly shapes its outcomes.

The prevalence of uterine malformation is estimated to be 6. 7 % in the general population, slightly higher ( 7. 3 %) in the infertility population, and significantly higher in a population of women with a history of recurrent miscarriages ( 16 %).

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.

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.

However, it is important to note that one Indian study from the state of Rajasthan states, " There is a significantly greater prevalence of multiple cardiovascular risk factors obesity, resting tachycardia, hypertension, high total and LDL cholesterol, and low HDL cholesterol, and electrocardiographic changes in tobacco users, chewing or smoking, as compared-to tobacco non-users.

The prevalence of canine distemper in the community has decreased dramatically due to the availability of vaccinations.

With the onset of the epidemiological transition and as the prevalence of infectious diseases decreased through the 20th century, public health began to put more focus on chronic diseases such as cancer and heart disease.

Since 2004, the threat risk from these variants has been changed to " low " due to decreased prevalence.

This is a traditional Japanese living arrangement, though its prevalence has decreased in recent years.

In the mid-20th century European and American railroad companies in many countries took measures to reduce overcrowding in cars and prevent riding on outside of them, so prevalence of train surfing in these countries decreased.

When penicillin became widely available in the 1940s, the prevalence of AR pupils ( which develop only after decades of untreated infection ) decreased dramatically.

In one study conducted in 12 villages in Peru, both humans and porcine were treated with praziquantel and oxfendazole, with the coverage of more than 75 % in humans and 90 % in pigs The result shows a decreased in prevalence and incidence in the intervention area ; however the effect did not completely eliminate T. solium.

This shift is attributed to a variety of widely recognized social changes that occurred in American society in the 1960s and 1970s: changing sexual morals increased the prevalence of sexual activity outside of marriage and decreased the stigma surrounding out-of-wedlock births ; American attitudes about marriage and divorce changed ; and women made economic gains that increased their independence and ability to leave unhappy marriages.

Nowadays, their use and prevalence has dramatically decreased.

By 2005, Vitamin A deficiency among children 12 to 59months, as measured by prevalence of night blindness, has decreased to 0. 04 % from 3. 76 % in 1982.

Records from the nutrition program of the municipality revealed the high prevalence rate of malnutrition has gradually decreased.

Mali ’ s contraceptive prevalence rate of 6 % was among the lowest worldwide and had stagnated since 2001, with the exception of the capital, Bamako, where the CPR decreased from 19 % to 16 % from 2001 to 2006.