Table 1.
Sample | Prevalence† | |||
---|---|---|---|---|
Selected characteristics | No. positive for HLA–B27 |
Total population |
% (95% CI) |
SE |
Overall US prevalence | 124 | 2,320 | 6.1 (4.6–8.2) | 0.8 |
Sex | ||||
Male | 53 | 1,123 | 5.8 (3.9–8.4) | 1.0 |
Female | 71 | 1,197 | 6.5 (4.7–8.9) | 1 |
Race/ethnic group | ||||
Non-Hispanic white | 79 | 1,021 | 7.5 (5.3–10.4)‡ | 1.2 |
Mexican American | 27 | 622 | 4.6 (3.4–6.1)§ | 0.6 |
Non-Hispanic black | 4 | 345 | 1.1 (0.4–3.1)¶ | 0.5 |
Age group | ||||
20–29 years | 39 | 498 | 8.0 (4.6–13.4) | 2.0 |
30–39 years | 26 | 471 | 5.6 (3.4–9.2) | 1.3 |
40–49 years | 34 | 508 | 8.1 (5.8–11.2) | 1.2 |
50–59 years | 11 | 404 | 2.9 (1.4–5.8)¶ | 0.9 |
60–69 years | 14 | 439 | 4.6 (1.9–10.7)¶ | 1.9 |
For race/ethnicity, only data for the major subgroups in the US are shown, which therefore do not sum to the overall sample size. All race/ethnicities are included in the overall prevalence estimates and in the prevalence estimates by sex and age. NHANES = National Health and Nutrition Examination Survey.
Estimates for sex and race/ethnicity are age-adjusted to the 2000 US civilian population using age groups 20–29 years, 30–39 years, 40–49 years, 50–59 years, and 60–69 years. The 95% confidence intervals (95% CIs) were constructed using the logit transformation (3).
P < 0.01 versus all other race/ethnic groups combined.
P < 0.05 versus non-Hispanic white persons.
Estimates do not meet criteria for statistical stability.