Table 1.
Participant characteristics and disease statuses of those included from the 3 studies
| Generalized OA n (%) or mean (SD) n = 1798 |
Genetics of Generalized OA n (%) or mean (SD) n = 1363 |
Johnston County OA Project n (%) or mean (SD) n = 1911 |
|
|---|---|---|---|
| Age, yrs | 69.3 (8.4) | 66.0 (10.0) | 66.5 (10.1) |
| Women | 1290 (71.8%) | 1068 (78.4%) | 1233 (64.5%) |
| African American | 0 (0%) | 0 (0%) | 620 (32.4%) |
| Body mass index, kg/m2 | 27.5 (5.1) | 29.1 (6.3) | 30.9 (6.5) |
| Back injury | 38 (2.1%) | 34 (2.5%) | 45 (2.4%) |
| Low back pain | 681 (37.9%) | 887 (65.1%) | 767 (40.1%) |
| Beighton ≥4 | 197 (11.0%) | 57 (4.2%) | 122 (6.4%) |
| Trunk flexion maneuver | 231 (12.9%) | 94 (6.9%) | 103 (5.4%) |
| Spine OA | 1039 (57.8%) | 791 (58.0%) | 1136 (59.5%) |
| Facet OA | 1333 (74.1%) | 903 (66.3%) | 1305 (68.3%) |
| Symptomatic spine OA | 446 (24.8%) | 556 (40.8%) | 474 (24.8%) |
| Symptomatic facet OA | 517 (28.8%) | 598 (43.9%) | 521 (27.3%) |
Facet OA = presence of facet joint OA at any lumbar spine level; OA = osteoarthritis; Spine OA = combination of at least mild disc space narrowing and presence of a mild osteophyte at the same lumbar level; SD = standard deviation