DOI: 10.3886/icpsr39032.v1
title: University of California, Irvine (UCI) COVID-19 Study, 2020-2021
title: Version 1

description: The University of California, Irvine COVID-19 Study is a longitudinal study of over 6,500 people from the NORC AmeriSpeak panel, a probability-based nationally representative sample of U.S. households on whom baseline mental and physical health data were collected prior to the start of the COVID-19 threat in the U.S. The study addresses the emotional (fear, worry, distress), cognitive (perceived risk), and behavioral (media use, health protective behaviors) responses to the COVID-19 outbreak and how they shape health outcomes over time. Researchers also examine how direct and indirect exposure through widespread media coverage of the COVID-19 outbreak are associated with acute stress responses, the media's success (or failure) in affording people the information needed to understand the threat, and how cognitive and affective processes shape risk assessments, behavioral responses, and mental health outcomes. Researchers have examined national trends over time in respondents' risk perceptions, fear, media use, health protective behaviors, and distress surrounding the outbreak.
description: The purpose of this study is to assess risk perceptions, media use, acute stress, social norms, self- and response-efficacy, and protective behaviors at the start of an ambiguous and deadly domestic threat on a large representative sample with existing pre-threat mental and physical health data.
description: Wave 1:
<strong>WEIGHT</strong> was calculated based on the complete Wave 1 sample and should be used for most cross-sectional analyses of the Wave 1 sample (N=6,514).
<strong>WEIGHT_C1, WEIGHT_C2, </strong> and <strong> WEIGHT_C3</strong> are the cohort specific weights. These are the weights to use if doing any cohort specific analyses.


Wave 2:
<strong> WEIGHTW2</strong> was calculated based on the complete Wave 2 sample and should be used for most cross-sectional analyses of the Wave 2 sample (N=5,661) or when completing longitudinal analyses of Waves 1 and 2.
<strong> WEIGHT_C1W2, WEIGHT_C2W2, </strong> and <strong> WEIGHT_C3W2</strong> are the cohort specific weights. These are the weights to use if doing any cohort specific analyses.


Wave 3:
<strong> WEIGHTCROSSW3</strong> was calculated based on the complete Wave 3 sample and should be used for most cross-sectional analyses of the Wave 3 sample (N=4,881) or when completing longitudinal analyses of Waves 1 and 3.
<strong> WEIGHTLONGW3</strong> was calculated based on the complete sample of individuals who completed Waves 1, 2, and 3 (n=4,667) and should be used for longitudinal analyses of all three waves (if a complete case analysis is necessary).
description: Response Rates: Overall completion rate for Wave 1 was 59.2% (Final N for Wave 1 was 6,514); Overall completion rate for Wave 2 was 87.1% (Final N for Wave 2 was 5,661), and overall completion rate for Wave 3 was 72.9% (Final N for Wave 3 was 4,881).
description: Presence of Common Scales: Likert-type scale and others
description: The probability sample was collected to represent the United States national sample.
description: Datasets: 
DS0: Study-Level Files
DS1: Wave 1 Public Use Data
DS2: Wave 1 Restricted Use Data
DS3: Wave 2 Public Use Data
DS4: Wave 2 Restricted Use Data
DS5: Wave 3 Public Use Data
DS6: Wave 3 Restricted Use Data
description: Adults in the United States. Smallest Geographic Unit: ZIP code
description: telephone interview; web-based survey