Estimated Prevalence of Inflammatory Back Pain in U.S. Adults 2009-10
| Inflammatory Back Pain (IBP) Case Criteria | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Calin et al. 1977 | ESSG 1991 | Berlin Set 8a | Berlin Set 7b | |||||||||||
| N | n | % | 95% CI | N | % | 95% CI | N* | n | % | 95% CI | n | % | 95% CI | |
| Overall US Prevalence† | 5103 | 246 | 5.0 | 4.2-5.8 | 274 | 5.6 | 4.7-6.5 | 3188 | 193 | 5.8 | 5.2-6.4 | 195 | 6.0 | 4.9-7.1 |
| Age Group | ||||||||||||||
| 20-35 Years | 1649 | 85 | 5.0 | 3.6-6.4 | 85 | 5.0 | 3.6-6.4 | 1649 | 75 | 4.8 | 3.6-6.0 | 94 | 6.2 | 4.5-7.9 |
| 36-49 Years | 1539 | 91 | 5.9 | 4.8-7.0 | 105 | 6.8 | 5.8-7.8 | 1539 | 118 | 6.8 | 5.7-7.9 | 101 | 5.9 | 4.5-7.3 |
| 50-69 Years | 1915 | 70 | 4.1 | 2.7-5.5 | 84 | 5.0 | 3.3-6.7 | n.a. | ||||||
| Gender† | ||||||||||||||
| Males | 2472 | 111 | 5.2 | 4.4-6.0 | 120 | 5.6 | 4.7-6.5 | 1492 | 79 | 5.4 | 4.4-6.4 | 79 | 5.4 | 4.3-6.5 |
| Females | 2631 | 135 | 4.9 | 3.8-6.0 | 154 | 5.6 | 4.3-6.9 | 1696 | 114 | 6.1 | 4.7-7.5 | 116 | 6.7 | 4.9-8.5 |
| Race / Ethnicity Groups† | ||||||||||||||
| Mexican-Americans | 1024 | 39 | 4.1 | 2.6-5.6 | 43 | 4.4£ | 2.9-5.9 | 642 | 30 | 4.9 | 2.7-7.1 | 26 | 4.2£ | 1.8-6.6 |
| Non-Hispanic Whites | 2244 | 147 | 5.9 | 4.9-6.9 | 160 | 6.5 | 5.4-7.6 | 1412 | 109 | 6.6 | 5.7-7.5 | 115 | 7.2 | 5.9-85 |
| Non-Hispanic Blacks | 963 | 31 | 3.3£ | 1.8-4.8 | 38 | 4.1£ | 2.2-6.0 | 558 | 30 | 5.5 | 2.8-8.2 | 28 | 5.1 | 3.1-7.1 |
Abbreviations: N=total population sampled; n=number of Inflammatory Back Pain cases; %= Prevalence; 95% CI=95% confidence interval; ESSG= European Spondyloarthritis Study Group; Berlin 8a, 7b= Inflammatory Back Pain Classification Criteria from Rudwaleit et al. [4].
↵* Berlin Criteria 8a, 7b apply only to adults 20-49 years of age (N=3188).
↵† Estimates age adjusted to the U.S. 2000 civilian population; for race/ethnicity, only data for the major U.S. subgroups is shown.
↵£ IBP prevalence significantly lower than Non-Hispanic whites; p ≤ .05.