Related Experiment Video
Updated: Aug 14, 2025
06:48
Breakfast Habits among Schoolchildren in the City of Uruguaiana, Brazil
Published on: July 29, 2020
4.6K
Changes in Screen Time in Brazil: A Time-Series Analysis 2016-2021
Pollyanna Costa Cardoso1,2, Thaís Cristina Marquezine Caldeira2, Taciana Maia de Sousa3
1Nutrition Department, Federal University of Juiz de Fora, Campus Governador Valadares, Brazil.
American Journal of Health Promotion : AJHP
|January 18, 2023
Summary
Leisure screen time, particularly on devices like cell phones, computers, and tablets (CCT), has significantly increased among Brazilian adults. This trend in digital screen time rose notably between 2016 and 2021.
Area of Science:
- Public Health
- Epidemiology
- Digital Health
Background:
- Leisure screen time is a growing public health concern globally.
- Understanding temporal trends in screen time is crucial for developing targeted interventions.
- Previous studies have indicated rising screen use, but specific trends in Brazil require detailed analysis.
Purpose of the Study:
- To analyze the temporal trend of leisure screen time among adults in Brazil from 2016 to 2021.
- To examine changes in time spent on television (TV) and cell phone, computer, or tablet (CCT) use.
- To identify trends across different sociodemographic groups.
Main Methods:
- Time-series analysis of six cross-sectional surveys from the Vigitel (2016-2021) database.
- Inclusion of a probabilistic sample of 265,252 Brazilian adults (≥18 years).
- Prais-Winsten regression models used to identify trends in leisure screen time.
Main Results:
- Mean time watching TV remained stable (2.3h to 2.2h/day) between 2016 and 2021.
- Mean time spent on cell phone, computer, or tablet (CCT) increased significantly (1.7h to 2.0h/day).
- The frequency of adults spending ≥3 hours/day on CCT rose from 19.9% to 25.5%.
Conclusions:
- Leisure screen time has increased among Brazilian adults, particularly CCT use.
- The rise in screen time was observed across all sociodemographic groups.
- These findings highlight a significant shift in leisure activities and potential public health implications.
Related Concept Videos
00:54Time-Series Graph
4.5K
A time-series graph is a line graph with repeated measurements taken at successive intervals of time. It is also called a time series chart. To construct a time-series graph, one must look at both pieces of a paired data set. The horizontal axis is used to plot the time increments, and the vertical axis is used to plot the values of the variable that one is measuring. By using the axes in this way, each point on the graph will correspond to time and a measured quantity. The points on the graph...
4.5K
01:24Position vs Time Graphs
1
Position vs Time GraphsA position vs. time graph is a visual representation of how an object’s position changes over time. By analyzing these graphs, you can understand whether an object is moving at a constant speed, accelerating, or staying still. The slope of the graph indicates the object’s speed; the steeper the slope, the faster the object moves.Understanding Position vs. Time GraphsA straight, sloped line represents motion at a constant speed, and the steepness of the slope shows how...
1
01:20Population Growth Patterns
2
Population Growth PatternsPopulation growth patterns show how the size of a group of living things changes over time. These patterns can increase, decrease, or stay the same depending on different factors. When birth rates exceed death rates, the population increases as more individuals are born than die. If more die than are born, the population shrinks. Other important factors include food, water, and space availability, and whether the environment is safe and healthy. Changes in weather,...
2
01:07Bar Graph
16.9K
A bar graph is also called a bar chart and consists of bars that are separated from each other. It either uses horizontal or vertical bars to show comparisons among categories. The bars can be rectangles, or they can be rectangular boxes (used in three-dimensional plots). One axis of the graph represents the specific categories being compared, and the other axis shows a discrete value. In this graph, the length of the bar for each category is proportional to the number or percent of individuals...
16.9K
01:14Time Course of Drug Effect
2.2K
The progression of a drug's impact can be analyzed by examining both the concentration-time course and the effect-time course. The concentration-time course is determined by the drug's half-life and is influenced by factors such as its pharmacokinetics, including absorption, distribution, metabolism, and elimination. The effect of the drug is often related to its concentration in the plasma and is calculated using the maximum drug effect and the plasma concentration that generates 50...
2.2K
01:07Multiple Bar Graph
5.4K
As the name suggests, a multiple bar graph is the same as a bar graph but has multiple bars to depict relationships between different data values. One can include as many parameters as possible. However, each parameter must have the same unit of measurement.
Each bar or column in the multiple bar graph represents a data value. These graphs are used primarily in interrelating two or more sets of data. The categories of different kinds of data are listed along the horizontal or x-axis, whereas...
Each bar or column in the multiple bar graph represents a data value. These graphs are used primarily in interrelating two or more sets of data. The categories of different kinds of data are listed along the horizontal or x-axis, whereas...
5.4K