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Table 6 Multinomial logistic regression of number of contacts before registering (95% confidence intervals)

From: Characterizing participants who respond to text, email, phone calls, or postcards in a SARS-CoV-2 prevalence study

Characteristics*

Reference: 3 contacts

1 Contact

2 Contacts

P value

Female

--

--

--

0.098

Male

1.0

1.23 (1.02–1.49)

0.94 (0.81–1.09)

Age

    

Age: <40

--

--

--

0.001

Age: 40–59

1.0

0.98 (0.78–1.23)

1.12 (0.92–1.35)

Age: 60+

1.0

1.35 (1.06–1.72)

1.12 (0.96–1.41)

Education

    

High School or less

--

--

--

< 0.0001

1–3 years College

1.0

0.55 (0.42–0.72)

1.08 (0.89–1.32)

4 years + College

1.0

0.41 (0.32–0.52)

1.24 (1.04–1.49)

Reasons for Participating

    

Feel good contributing to scientific research

1.0

0.33 (0.13–0.88)

1.58 (0.87–2.85)

0.061

Gaining knowledge of own Covid-19 status

1.0

0.67 (0.44–1.05)

1.28 (0.92–1.79)

0.155

Free Testing: Not Important

--

--

--

0.003

Free Testing: Important

1.0

1.37 (1.08–1.75)

0.72 (0.58–0.87)

No Previously Positive Household Member

--

--

--

0.554

Previously Positive Household Member

1.0

2.20 (0.46–10.5)

1.04 (0.42–2.56)

  1. *Characteristics that were statistically significant in the chi sq analysis were fitted in the regression model