Introduction to Epidemiology

For this assignment, you will state the type of study (identify the study design) described in each of the following paragraphs (2.5 points). For each study describe one strength and one limitation (5). The strength and limitation must be specific to the scenario described, not about the study design in general. Your writing (grammar, spelling, and correct use of scientific terminology) will also be graded (2.5 points).
1) A study was conducted to evaluate the relationship between sleep duration and disturbance, and body mass index. Five hundred graduate students from a large university in California completed a survey during the first week of class in the fall 2018 semester. The survey included questions about demographic and socioeconomic characteristics, sleep patterns, weight, height, and physical activity.

Study design:
Strength:
Limitation

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2) Epidemiologists wanted to investigate the incidence of hepatitis C virus (HCV) infection among people who inject drugs. In 2018, they identified a group of people who did not have HCV and started to use the syringe exchange in in 2010. The researchers used records maintained by the syringe exchange program to determine how many participants became infected with HCV between 2010 and 2015.

Study design:
Strength:
Limitation

3) To evaluate a new physical activity program, students were allocated to either their conventional physical education (PE) class or the new physical activity program. Their BMI and endurance were measured at baseline and after 3 months. Random allocation was not possible, so the researchers gave the morning PE classes the new physical activity program. The afternoon PE classes completed the conventional PE program.

Study design:
Strength:
Limitation

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4) Three hundred people who had a stroke were identified from an emergency department. They were compared with 400 people from the catchment area of the emergency department. Smoking and physical activity in the past 12 months and family history of diabetes were compared between the two groups.

Study design:
Strength:
Limitation

5) To evaluate the relationship between alcohol consumption and anxiety and depression, a group of 500 young adults who did not have a mental disorder were enrolled in a study. Every year from 2010 until 2019, the participants completed a survey which assessed their alcohol consumption and symptoms of anxiety and depression.

Study design:
Strength:
Limitation. For more information on Introduction to Epidemiology check out: https://www.britannica.com/science/epidemiology

Attachment: PUBH3050 Class 16 relative risk Homework 6 Study design PUBH3050 Class 15 odds ratios

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