Table 3 Bivariate contingency table of the frequency of SIJ BME in males and females stratified for HLA-B27 positivity
Sex | HLA-B27 | SIJ BME count (Berlin score) | |||
|---|---|---|---|---|---|
None | 1 | 2 | ≥3 | ||
Male | negative | 296 | 44 | 12 | 7 |
positive | 25 | 4 | 1 | 3 | |
Female | negative | 307 | 35 | 19 | 5 |
positive | 29 | 4 | 2 | 0 | |