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Table 2 Demographic characteristics of enrollees having completed the questionnaire in our study compared to NHANES and Iowa state populations

From: Human biomonitoring without in-person interaction: public health engagements during the COVID-19 pandemic and future implications

Characteristic

Category

Result (n = 420)

NHANESa (n = 596)

Iowab

Sex

Male

215 (51.2%)

327 (54.9%)

50.2%

 

Female

204 (48.6%)

269 (45.1%)

49.8%

 

Not reported

1 (0.2%)

0

-

Race

White

414 (98.6%)

396 (66.4%)

84.5%

 

Black or African American

1 (0.2%)

33 (5.5%)

3.6%

 

Hispanic

-

132 (22.1%)

6.6%

 

American Indian or Alaska Native

0

-

0.5%

 

Native Hawaiian or Other Pacific Islander

0

-

0.2%

 

Asian

1 (0.2%)

7 (1.2%)

2.8%

 

Not reported

4 (1.10%)

0

-

Educationc

Less than high school graduate

2 (0.5%)

109 (28.5%)

6.6%

 

High school graduate (or equivalent)

49 (11.7%)

98 (25.7%)

30.3%

 

Some college, no degree

83 (19.8%)

112 (29.3%)

20.6%

 

Associate degree in college (2-year)

85 (20.2%)

12.0%

 

Bachelor’s degree in college (4-year)

120 (28.6%)

63 (16.5%)

20.7%

 

Master’s degree (example: MA, MS, MEng, EEd)

54 (12.9%)

9.9%

 

Doctoral degree (example: PhD, EdD)

10 (2.4%)

 

Professional degree (example: MD, DDS, DVM)

16 (3.8%)

 

Not reported

1 (0.2%)

0

-

Total length of residence

1–2 years

17 (4.0%)

  
 

3–5 years

53 (12.6%)

  
 

6–10 years

52 (12.4%)

  
 

More than 10 years

294 (70.0%)

  
 

Not reported

4 (1.0%)

  

Occupation

Academic Research

1 (0.2%)

  
 

Architecture and Engineering

10 (2.4%)

  
 

Arts, Design, Entertainment, Sports, and Media

6 (1.4%)

  
 

Building and Grounds Cleaning and Maintenance

1 (0.2%)

  
 

Business and Financial Operations

11 (2.6%)

  
 

Community and Social Service

7 (1.7%)

  
 

Computer and Mathematical

6 (1.4%)

  
 

Construction and Extraction

8 (1.9%)

  
 

Educational Instruction and Library

40 (9.5%)

  
 

Farming, Fishing, and Forestry

39 (9.3%)

  
 

Food Preparation and Serving Related

4 (1.0%)

  
 

Healthcare Practitioners and Technical

44 (10.5%)

  
 

Healthcare Support

18 (4.3%)

  
 

Installation, Maintenance, and Repair

19 (4.5%)

  
 

Legal

1 (0.2%)

  
 

Life, Physical, and Social Science

6 (1.4%)

  
 

Management

69 (16.4%)

  
 

Office and Administrative Support

28 (6.7%)

  
 

Other

35 (8.3%)

  
 

Personal Care and Service

5 (1.2%)

  
 

Production

17 (4.0%)

  
 

Protective Service

2 (0.5%)

  
 

Sales and Related

25 (6.0%)

  
 

Transportation and Material Moving Occupations

13 (3.1%)

  
 

Not reported

5 (1.2%)

  

Income

Less than $25,000

18 (4.3%)

116 (22.9%)

19.5%

 

$25,000–49,999

51 (12.1%)

280 (47.0%)

23.3%

 

$50,000–74,999

74 (17.6%)

13.9%

 

$75,000–99,999

77 (18.3%)

53 (8.9%)

9.0%

 

$100,000–149,999

102 (24.3%)

110 (18.5%)

17.9%

 

$150,000 or more

84 (20.0%)

18.9%

 

Not reported

14 (3.3%)

32 (5.4%)

-

  1. aParticipants reporting their primary tap water as ‘well or rain cistern’ in the CDC NHANES 2015–2016
  2. bPercentage of the total population in Iowa from 2021 American Community Survey 1-year estimate (n = 3,200,517)
  3. cEducational attainment from population over 20 years old in the NHANES participants, and over 25 years old in the ACS