Table 2.

Unadjusted and adjusted prevalence ratios (PRs) for tetanus seroimmunity among persons aged ≥ 6 years, National Health and Nutrition Examination Survey, 2015–2016

Demographic Characteristic	Sample Size (Unweighted)	PR % (95% CI)	aPR* % (95% CI)
Sex
Male	2856	1.00	1.00
Female	3054	0.97 (0.96 – 1.00)	0.97 (0.96–1.00)
Age (years)
<65	4839	1.00	1.00
≥65	1071	0.89 (0.86 – 0.93)	0.89 (0.85 – 0.93)
Race/Ethnicity
Non-Hispanic White	1965	1.00	1.00
Non-Hispanic Black	1099	0.98 (0.96 – 1.00)	0.97 (0.95–1.00)
Hispanic	1978	0.95 (0.93 – 0.98)	0.96 (0.94–1.00)
Other	868	0.96 (0.93 – 1.00)	0.98 (0.95–1.00)
Country of Birth
United States	4310	1.00	1.00
Other	1599	0.93 (0.90 – 0.95)	0.95 (0.93–0.98)
Poverty level
At/above poverty level	4076	1.00	1.00
Below poverty	1299	0.97 (0.96 – 0.99)	1.00 (0.97–1.01)

^*Model includes sex, age in years, race/ethnicity, country of birth, and poverty level