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Related Concept Videos

Systematic Sampling Method01:17

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Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. Data are the result of sampling from a population. The sampling method ensures that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
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In the case of systematic errors, the sources can be identified, and the errors can be subsequently minimized by addressing these sources. According to the source, systematic errors can be divided into sampling, instrumental, methodological, and personal errors.
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Data are individual items of information obtained from a population or sample. Data may be classified as qualitative (categorical), quantitative continuous, or quantitative discrete. Because it is not practical to measure the entire population in a study, researchers use samples to represent the population. A random sample is a representative group from the population chosen by using a method that gives each individual in the population an equal chance of being included in the sample. Random...
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In statistics, several tools are used to interpret the data. Measures of central tendency represent the characteristics of the data, such as mean, median, and mode. Additionally, measures of variance like standard deviation and range are used to find the spread of data from the mean. Relative standing measures the distance between data locations. Commonly used measures of relative standings are percentile, z score, and quartiles.
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Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
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Related Experiment Video

Updated: Mar 9, 2026

Author Spotlight: Evaluating the Adjuvant Efficacy and Safety of Angong Niuhuang Pill in Viral Encephalitis Treatment
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A Systematic Review.

Sarah Drejet1, Stacey Halum2,3, Matthew Brigger4

  • 11 Indiana University School of Medicine, Indianapolis, Indiana, USA.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|January 11, 2017
PubMed
Summary

This review found that while intralesional cidofovir and bevacizumab show promise for treating recurrent respiratory papillomatosis, most studies were low quality. Consistent outcome reporting is needed for effective comparison of these treatments.

Keywords:
Avastinadjuvant therapybevacizumabcidofovirrecurrent respiratory papillomatosis

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Area of Science:

  • Otolaryngology
  • Respiratory Medicine
  • Pharmacology

Background:

  • Recurrent respiratory papillomatosis (RRP) is a rare, chronic condition.
  • Treatment often involves repeated surgical debridement.
  • Adjunctive therapies are explored to improve outcomes and reduce surgical burden.

Purpose of the Study:

  • To systematically review studies on intralesional cidofovir and bevacizumab for adult RRP.
  • To assess disease severity and functional outcomes.
  • To compare the efficacy and safety of cidofovir versus bevacizumab.

Main Methods:

  • Systematic literature search of Ovid Medline, EMBASE, Scopus, and ClinicalTrials.gov.
  • Inclusion/exclusion criteria applied to 254 identified studies, with 16 selected for review.
  • Quality assessment using the Newcastle-Ottawa Scale; criteria for comparative analysis established.

Main Results:

  • 14 studies evaluated cidofovir, 2 evaluated bevacizumab.
  • Remission rate was the most common disease severity outcome (14 studies).
  • Functional outcomes (e.g., voice quality) reported in 36% of studies; 75% of studies were poor quality.
  • Improved outcomes noted, but inconsistent measures prevented direct comparison.

Conclusions:

  • Remission rate and voice-related quality of life were key reported outcomes.
  • High prevalence of poor-quality studies limits definitive conclusions.
  • Lack of standardized reporting and comparative data hinders direct comparison between cidofovir and bevacizumab.