A recent systematic review suggested that physical therapy is effective, but there is only moderate evidence to support this conclusion.

A 1998 systematic review of studies assessing its prevalence in 13 countries concluded that about 31 % of cancer patients use some form of complementary and alternative medicine .< ref name = Ernst_Cassileth > Alternative medicine varies from country to country.

A systematic 2003 review of controlled clinical trials related to the Alexander Technique found two reputable studies suggesting the Alexander Technique is effective in reducing the disability of patients suffering from Parkinson ’ s disease and improving pain behaviour and disability in patients with back pain, and concluded that the evidence supporting the effectiveness of the Alexander Technique is encouraging but not convincing.

A systematic review of randomized controlled trials published in the Archives of General Psychiatry showed up to one-third of the six-week effect of SSRI treatment can be seen in the first week.

Nevertheless, a 2009 systematic review and meta-analysis of trials in people diagnosed with schizophrenia found that less than half ( 41 %) showed any therapeutic response to an antipsychotic, compared to 24 % on placebo, and that there was a decline in treatment response over time, and possibly a bias in which trial results were published.

A systematic review by the Cochrane Collaboration found no studies of sufficient quality to make any statement on the efficacy of the vaccine.

Guidelines issued by the UK-based National Institute for Health and Clinical Excellence ( NICE ), carried out a systematic review using different methodology and came to a different conclusion.

However, controversy exists as to tolerance to the anxiolytic effects with some evidence that benzodiazepines retain efficacy and opposing evidence from a systematic review of the literature that tolerance frequently occurs and some evidence that anxiety may worsen with long-term use.

A systematic review of CBT in depression and anxiety disorders concluded that " CBT delivered in primary care, especially including computer-or Internet-based self-help programs, is potentially more effective than usual care and could be delivered effectively by primary care therapists.

A systematic review found that the risk of death from manipulations to the neck outweighs the benefits.

“ Health effects of Relocation following disasters: a systematic review of literature ”.

Using techniques from science, engineering and statistics, such as the systematic review of medical literature, meta-analysis, risk-benefit analysis, and randomized controlled trials ( RCTs ), EBM aims for the ideal that healthcare professionals should make " conscientious, explicit, and judicious use of current best evidence " in their everyday practice.

The systematic review of published research studies is a major method used for evaluating particular treatments.

A 2001 review of 160 Cochrane systematic reviews ( excluding complementary treatments ) in the 1998 database revealed that, according to two readers, 41. 3 % concluded positive or possibly positive effect, 20 % concluded evidence of no effect, 8. 1 % concluded net harmful effects, and 21. 3 % of the reviews concluded insufficient evidence.

The second area is the systematic review of medical literature to evaluate the best studies on specific topics.

For example, the strongest evidence for therapeutic interventions is provided by systematic review of randomized, triple-blind, placebo-controlled trials with allocation concealment and complete follow-up involving a homogeneous patient population and medical condition.

It concludes from a systematic review of available research that,

*" A systematic review has found that hypnosis enhances the effects of cognitive behavioural therapy for conditions such as phobia, obesity, and anxiety.

According to a systematic review by the Cochrane Collaboration, the best evidence in the treatment of LEMS exists for 3, 4-aminopyridine and IVIG.

A systematic review of the literature related to PID treatment was performed prior to the 2006 CDC sexually transmitted infections treatment guidelines.

Consequently, a systematic review by the Cochrane Collaboration ( published in 2008 ) found insufficient evidence to recommend the use of silver-treated dressings to treat infected wounds.

A systematic review by the Cochrane Collaboration found no studies of sufficient quality to make any statement on the efficacy of the vaccine.

In a systematic review including two prospective studies of 47, XYY boys identified by newborn screening programs and one retrospective study of 47, XYY men identified by screening men over 184 cm ( 6 ' 0 ") in height, forty-two 47, XYY boys and men had an average 99. 5 verbal IQ and 106. 4 performance IQ .< ref name =" Ratcliffe 1994 ">

In a recent systematic review of eight trials of day care for disadvantaged children under 5 years of age, long term follow up showed lower pregnancy rates among adolescents.

" In 2003, The UK ECT Review group published a systematic review and meta-analysis comparing ECT to placebo and antidepressant drugs.

The measurements made with the NRL 50-foot reflector, which is altitude-azimuth-mounted, would have shown a systematic change with local hour angle in the measured intensities of Venus and Jupiter if a substantial part of the radiation had been linearly polarized.

If the drift error is systematic, it can be canceled with a bias circuit which can be arranged and adjusted to supply the required compensating current.

With Robert Morison ’ s 1672 Plantarum umbelilliferarum distribution nova it became the first group of plants for which a systematic study was published.

His industry in every department was great, and though we find in his system many gaps which are characteristic of scholastic philosophy, his protracted study of Aristotle gave him a great power of systematic thought and exposition.

Abba Arikka ( 175 – 247 ) ( Talmudic Aramaic: ; born: Abba bar Aybo, Hebrew: רבי אבא בר איבו ) was a Jewish Talmudist who lived in Sassanid Babylonia, known as an amora ( commentator on the Oral Law ) of the 3rd century who established at Sura the systematic study of the rabbinic traditions, which, using the Mishnah as text, led to the compilation of the Talmud.

Guderian's leadership was supported, fostered and institutionalized by his supporters in the Reichswehr General Staff system, which worked the Army to greater and greater levels of capability through massive and systematic Movement Warfare war games in the 1930s.

Since the end of the Second World War, the development of computers has allowed a systematic development of computational chemistry, which is the art of developing and applying computer programs for solving chemical problems.

In 1840, Gauss published his influential Dioptrische Untersuchungen, in which he gave the first systematic analysis on the formation of images under a paraxial approximation ( Gaussian optics ).

While a young researcher working for the Lowell Observatory in Flagstaff, Arizona, Tombaugh was given the job to perform a systematic search for a trans-Neptunian planet ( also called Planet X ), which had been predicted by Percival Lowell and William Pickering.

Since the end of the Second World War, the development of computers has allowed a systematic development of computational chemistry, which is the art of developing and applying computer programs for solving chemical problems.

These and similar names for the ends of the carotenoid molecules form the basis of a systematic naming scheme, according to which:

Human Rights Watch released a report on the situation in 1989, which stated: " contras were major and systematic violators of the most basic standards of the laws of armed conflict, including by launching indiscriminate attacks on civilians, selectively murdering non-combatants, and mistreating prisoners.

The dissolution of the Soviet Union was a process of systematic disintegration, which occurred in economy, social structure and political structure.

In addition to his writings on computer science, Knuth, a Lutheran, is also the author of 3: 16 Bible Texts Illuminated, in which he examines the Bible by a process of systematic sampling, namely an analysis of chapter 3, verse 16 of each book.

Years later, Dada artists described the movement as " a phenomenon bursting forth in the midst of the postwar economic and moral crisis, a savior, a monster, which would lay waste to everything in its path ... was a systematic work of destruction and demoralization ...

Divination can be seen as a systematic method with which to organize what appear to be disjointed, random facets of existence such that they provide insight into a problem at hand.

He was assistant librarian of Harvard University from 1856 to 1872, and planned and perfected an alphabetical card catalog, combining many of the advantages of the ordinary dictionary catalogs with the grouping of the minor topics under more general heads, which is characteristic of a systematic catalogue.

The Nazis used the euphemism Endlösung der Judenfrage ( Final Solution of the Jewish Question ) to describe their systematic killing of Europe's Jews, which Nazi leaders likely decided during the first half of 1941.

In more recent years, a greater understanding of the causes of food-borne illnesses has led to the development of more systematic approaches such as the Hazard Analysis and Critical Control Points ( HACCP ), which can identify and eliminate many risks.

Fluid dynamics offers a systematic structure — which underlies these practical disciplines — that embraces empirical and semi-empirical laws derived from flow measurement and used to solve practical problems.

Galen's insistence on a rational systematic approach to medicine set the template for Islamic medicine, which rapidly spread throughout the Arab Empire.

His thorough grounding in philology and philosophy had accustomed him to systematic thinking, and this enabled him to construct out of his studies and observations of minerals a logical system which he began to publish in 1528.

The work is a complete and systematic treatise on mining and extractive metallurgy, illustrated with many fine and interesting woodcuts which illustrate every conceivable process to extract ores from the ground and metal from the ore, and more besides.

The earliest known systematic historical thought in the Western world emerged in ancient Greece, a development which would be an important influence on the writing of history elsewhere around the Mediterranean region.