Anxiety: A Measure of Anxiety
In lordif: Logistic Ordinal Regression Differential Item Functioning using IRT

Description Usage Format Source References Examples

The data contains responses from 766 people sampled from a general population to the PROMIS Anxiety scale (http://www.nihpromis.org) composed of 29 Likert-type questions with a common rating scale (1=Never, 2=Rarely, 3=Sometimes, 4=Often, and 5=Always).

1	data(Anxiety)

A data frame with 766 observations on the following 32 variables.

age: 0=younger than 65 and 1=65 and older
gender: 0=Male and 1=Female
education: 0=some college or higher and 1=high school or lower
R1: I felt fearful
R2: I felt frightened
R3: It scared me when I felt nervous
R4: I felt anxious
R5: I felt like I needed help for my anxiety
R6: I was concerned about my mental health
R7: I felt upset
R8: I had a racing or pounding heart
R9: I was anxious if my normal routine was disturbed
R10: I had sudden feelings of panic
R11: I was easily startled
R12: I had trouble paying attention
R13: I avoided public places or activities
R14: I felt fidgety
R15: I felt something awful would happen
R16: I felt worried
R17: I felt terrified
R18: I worried about other people's reactions to me
R19: I found it hard to focus on anything other than my anxiety
R20: My worries overwhelmed me
R21: I had twitching or trembling muscles
R22: I felt nervous
R23: I felt indecisive
R24: Many situations made me worry
R25: I had difficulty sleeping
R26: I had trouble relaxing
R27: I felt uneasy
R28: I felt tense
R29: I had difficulty calming down

http://www.nihpromis.org

PROMIS Cooperative Group. Unpublished Manual for the Patient-Reported Outcomes Measurement Information System (PROMIS) Version 1.1. October, 2008: http://www.nihpromis.org

1	## Not run: data(Anxiety)

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