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Table 3 We fit generalized estimating equations with robust standard errors and quasi-poisson outcome distribution to estimate predictors of the total number of non-household contacts amongst all households surveyed in the study (N = 1967)

From: Longitudinal social contacts among school-aged children during the COVID-19 pandemic: the Bay Area Contacts among Kids (BACK) study

Participant characteristics

Count Ratio (95% CI)

 

Unadjusted

Adjusted

  

Model 1

Model 2

Model 3

Age

    

 0–4

0.51 (0.44,0.6)

0.52 (0.44,0.60)

0.52 (0.44,0.61)

0.52 (0.45,0.6)

 5–12

0.48 (0.42,0.54)

0.49 (0.43,0.55)

0.49 (0.43,0.55)

0.49 (0.43,0.55)

 13–17

0.46 (0.39,0.54)

0.47 (0.40,0.55)

0.47 (0.41,0.55)

0.47 (0.4,0.55)

 18–39

Ref

Ref

Ref

Ref

 40–64

0.98 (0.87,1.11)

1.02 (0.90,1.16)

1.03 (0.9,1.17)

1.02 (0.9,1.16)

 65 + 

0.87 (0.52,1.48)

0.83 (0.48,1.42)

0.84 (0.48,1.43)

0.82 (0.47,1.41)

Race

    

 White

Ref.

Ref.

Ref.

Ref..

 Asian

0.75 (0.64,0.86)

0.77 (0.67,0.90)

0.79 (0.68,0.92)

0.77 (0.67,0.89)

 Black or African American

1.08 (0.86,1.36)

0.98 (0.78,1.25)

0.96 (0.76,1.22)

0.99 (0.79,1.25)

 Some other race alone

0.80 (0.62,1.02)

0.65 (0.5,00.85)

0.66 (0.5,0.86)

0.66 (0.51,0.87)

 Two or more races

1.28 (0.93,1.75)

1.11 (0.81,1.52)

1.13 (0.83,1.55)

1.13 (0.83,1.55)

 Hispanic

1.24 (1.07,1.43)

1.17 (0.99,1.38)

1.16 (0.99,1.37)

1.14 (0.97,1.34)

 Household income ≥ $150,000

0.79 (0.69,0.89)

0.82 (0.72,0.94)

0.84 (0.73,0.96)

0.81 (0.71,0.93)

 Number of household members

0.98 (0.92,1.04)

1.07 (1.01,1.14)

1.08 (1.02,1.14)

1.07 (1.01,1.14)

Single Parent

1.45 (1.17,1.79)

1.48 (1.16,1.89)

1.45 (1.14,1.85)

1.47 (1.15,1.87)

 Wave

    

 Wave 1–May 2020

Ref.

Ref.

Ref.

Ref

 Wave 2–Sep 2020

1.36 (1.15,1.6)

1.25 (1.06,1.47)

1.18 (1,1.4)

1.25 (1.06,1.47)

 Wave 3–Feb 2021

1.38 (1.17,1.61)

1.26 (1.08,1.48)

1.19 (1.01,1.41)

1.01 (0.84,1.21)

 More adults working from home1

0.71 (0.63,0.8)

 

0.81 (0.70,0.93)

 

 Vaccinated household member

1.55 (1.33,1.79)

  

1.62 (1.35,1.94)

  1. We fit three adjusted models, each adjusting for age, race/ethnicity, household income, number of household members, and study wave. We additionally included the predictor for whether more or less adults worked from home, and whether a household member was vaccinated in model 2 and 3, respectively
  2. 1Missing values of whether more adults work from home during shelter in place (3.9%; 76/1967%) were multiply imputed from five independent data-sets using Amelia II