Table 5.
Facet joint osteoarthritis by demographic, clinical and radiographic factors.
| Facet Joint Osteoarthritis | |||
|---|---|---|---|
|
| |||
| Present | Absent | ||
| n=486 | n=354 | p-value | |
| Age, mean (SD) | 64.7 (10.2) | 57.5 (8.2) | <0.001 |
|
| |||
| BMI, mean (SD) | 30.8 (6.6) | 29.9 (6.0) | 0.039 |
|
| |||
| Race, n (%) | |||
|
| |||
| AA | 142 (44.7) | 176 (55.4) | <0.001 |
| Caucasian | 344 (65.9) | 178 (34.1) | |
|
| |||
| Gender, n (%) | |||
|
| |||
| Men | 163 (51.6) | 153 (48.4) | 0.004 |
| Women | 323 (61.6) | 201 (38.4) | |
|
| |||
| Low Back Symptoms, n (%) n=839 |
247 (50.8) | 175 (49.6) | 0.721 |
|
| |||
| Knee OA, n (%) n=807 |
174 (37.8) | 64 (18.4) | <0.001 |
|
| |||
| Hip OA, n (%) n=818 |
118 (25.1) | 74 (21.3) | 0.214 |
|
| |||
| Hand OA, n (%) n=838 |
179 (36.8) | 40 (11.3) | <0.001 |
Low back symptoms defined as pain aching or stiffness on most days. BMI=body mass index. OA=osteoarthritis. SD=standard deviation. Proportions for symptoms, knee, hip and hand OA differ from column due to missing data. Facet joint OA coded as absent or present. Knee and hip OA defined as KL score of 2-4. Hand OA defined as the presence of KL grade 2-4 in at least one distal interphalangeal joint and 2 other interphalangeal joints or carpometacarpal joints.