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Table 1 Background characteristics of respondents aged 20 years and above, NHANES 2013–2014 (n = 4386)

From: Niacin, lutein and zeaxanthin and physical activity have an impact on Charlson comorbidity index using zero-inflated negative binomial regression model: National Health and Nutrition Examination Survey 2013–2014

 

Study Participants

Variable

n (%a)

Age

 20–39

1456 (34.9)

 40–59

1501 (37.2)

 60 and above

1429 (27.9)

Gender

 Male

2154 (49.6)

 Female

2232 (50.4)

Race/ethnicity

 Hispanic

946 (13.8)

 Non-Hispanic White

2018 (68.7)

 Non-Hispanic Black

863 (10.5)

 Other Races (Including Multi-Racial)

559 (7.0)

Educational attainment

 Less than High school

842 (13.6)

 GED/AA degree

2396 (55.2)

 College and higher

1148 (31.2)

Income

 0–24,999

1343 (22.5)

 25,000–54,999

1275 (27.1)

 55,000–74,999

470 (12.0)

 75,000 and above

1298 (38.4)

Smoking

 Yes

1942 (43.8)

 No

2444 (56.2)

Drinking

 Yes

3219 (78.6)

 No

1167 (21.4)

  1. aAll data are weighted to be nationally representative