Table 1.
Patient characteristics of the training set and distributions of their codified and narrative data
| axSpA cases | Controls | P-value | ||
|---|---|---|---|---|
| N | 127 | 423 | ||
| Age, years | 51.7 (18.4) | 55.4 (19.0) | 0.055 | |
| Male | 106 (83) | 196 (46) | <0.001 | |
| Race | White | 110 (87) | 356 (84) | 0.800 |
| African American | 12 (3) | 3 (2) | ||
| Other | 55 (13) | 14 (11) | ||
| HLA-B27 tested | 50 (39) | 89 (21) | <0.001 | |
| HLA-B27 positive | 40 (80) | 47 (53) | <0.001 | |
| Uveitis | 30 (24) | 23 (5) | <0.001 | |
| Psoriasis | 5 (4) | 38 (9) | 0.063 | |
| IBD | 10 (8) | 16 (4) | 0.057 | |
| Number of ICD codes for AS | 7 (2–13) | 0 (0–1) | <0.001 | |
| Number of AS concepts | 21 (8–59) | 1 (0–4) | <0.001 | |
| Number of sacroiliitis concepts | 1 (0–7) | 0 (0–1) | <0.001 | |
| Number of HLA-B27 concepts | 1 (0–6) | 0 (0–1) | <0.001 | |
| Number of spondylitis concepts | 2 (0–6) | 0 (0–1) | <0.001 | |
| Rheumatologist diagnosis of AS | 127 (100) | 62 (15) | — | |
Data shown as mean (s.d.), n (%) or median (interquartile range). axSpA: axial SpA; IBD: inflammatory bowel disease; ICD: International Classification of Diseases – versions 9 and 10.