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Related Concept Videos

Experimental Designs01:16

Experimental Designs

An experimental design is a systematic process that allows researchers to evaluate the relationship between dependent and independent variables. There are three widely used types of experimental design - pre-experimental design, true experimental design, and quasi-experimental design. In pre-experimental design, the researcher compares the data before and after some interventions or treatments. The true-experimental design has more than one purposefully created group, a commonly measured...
Blind Procedures02:07

Blind Procedures

Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which child was...
Regression Toward the Mean01:52

Regression Toward the Mean

Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when researchers try to extrapolate results...
Attention-Deficit/Hyperactivity Disorder01:30

Attention-Deficit/Hyperactivity Disorder

Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.

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Related Experiment Video

Updated: Jul 10, 2026

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
19:15

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale

Published on: August 25, 2014

[Caffeine and birth weight--randomised double blind trial].

Bodil Hammer Bech1, Carsten Obel, Tine Brink Henriksen

  • 1Aarhus Universitet, Institut for Folkesundhed, Afdeling for Epidemiologi, Arhus C. bhb@soci.au.dk

Ugeskrift for Laeger
|October 24, 2007
PubMed
Summary
This summary is machine-generated.

Reducing caffeine intake during pregnancy did not affect birth weight or gestation length. This randomized trial found no significant differences between caffeinated and decaffeinated coffee groups, suggesting moderate caffeine reduction is safe.

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Area of Science:

  • Obstetrics and Gynecology
  • Perinatal Medicine
  • Nutritional Science

Context:

  • Caffeine consumption during pregnancy is a public health concern due to potential adverse fetal outcomes.
  • Existing evidence from observational studies on caffeine's impact on fetal growth is inconsistent.
  • Randomized controlled trials are needed to clarify the relationship between caffeine intake and pregnancy outcomes.

Purpose:

  • To investigate the effect of reducing caffeine intake on fetal growth, specifically birth weight and length of gestation.
  • To provide robust evidence from a randomized double-blind trial on caffeine's role in pregnancy.

Summary:

  • A randomized double-blind trial compared caffeinated coffee with decaffeinated coffee in pregnant women.
  • No statistically significant differences were observed in mean birth weight between the two groups.
  • Similarly, no differences were found in the mean length of gestation between women consuming caffeinated versus decaffeinated coffee.

Impact:

  • Moderate reduction in caffeine intake in the latter half of pregnancy does not appear to influence birth weight or gestation length.
  • Findings may inform clinical guidelines regarding caffeine consumption during pregnancy.
  • Contributes to the understanding of maternal diet and fetal development.