Table 6 Difference between AS cases with HLA-B27 positivity and negativity
From: Development and validation of a machine learning-based nomogram for predicting HLA-B27 expression
|  | HLA-B27 positivity (N = 124) | HLA-B27 negativity (N = 24) | P-value |
|---|---|---|---|
The pain at night | |||
 No symptom | 64 (51.6%) | 13 (54.1%) | 0.99 |
 Mild pain | 48 (38.7%) | 9 (37.5%) | |
 Moderate pain | 7 (5.7%) | 1 (4.2%) | |
 Severe pain | 5 (4%) | 1 (4.2%) | |
Morning stiffness time | |||
 No symptom | 76 (61.3%) | 8 (33.3%) | 0.024 |
 One hour | 33 (26.6%) | 14 (58.3%) | |
 Two hours | 9 (7.3%) | 1 (4.2%) | |
 Three hours | 6 (4.8%) | 1 (4.2%) | |