Characteristics of patients with atlanto-axial pannus.
| Characteristics | Total, n = 105 | RA, n = 29 | No RA, n = 76 | p |
|---|---|---|---|---|
| Age, yrs, median (IQR) | 75 (65–83) | 63 (49–71) | 79 (72–85) | < 0.0001 |
| Sex | 0.0032 | |||
| Female | 67 (64) | 25 (86) | 42 (55) | |
| Male | 38 (36) | 4 (14) | 34 (45) | |
| Race | 0.49 | |||
| White | 87 (85) | 22 (79) | 65 (88) | |
| Hispanic | 4 (4) | 2 (7) | 2 (3) | |
| Asian or Pacific Islander | 3 (3) | 1 (4) | 2 (3) | |
| Black | 8 (8) | 3 (11) | 5 (7) | |
| Pertinent clinical history | ||||
| Neck pain | 69 (78) | 22 (81) | 47 (76) | 0.56 |
| Radicular pain or headache | 37 (51) | 9 (39) | 28 (57) | 0.15 |
| Upper extremity motor or sensory deficit | 36 (42) | 11 (39) | 25 (43) | 0.74 |
| Findings of myelopathy | 36 (39) | 12 (43) | 24 (37) | 0.59 |
| Trauma | 27 (26) | 4 (14) | 23 (32) | 0.07 |
| Prior cervical spine surgery | 12 (13) | 0 (0) | 12 (18) | 0.016 |
| Cervical spine surgery after index MRI | ||||
| Any cervical spine surgery | 28 (27) | 6 (21) | 22 (30) | 0.35 |
| Surgery of atlanto-axial region | 17 (17) | 4 (14) | 13 (15) | 0.78 |
Values are n (%) unless otherwise specified. Percentages were calculated excluding subjects with missing data. Values in bold face are statistically significant. RA: rheumatoid arthritis; IQR: interquartile range; MRI: magnetic resonance imaging.