Table 3 Prevalence of radiographic and clinical sub-phenotypes of OA in the study population, stratified by HBM status
| Â | All hips | HBM hips | Non-HBM hips | |||
Total N | N (%) with sub-phenotype | Total N | N (%) with sub-phenotype | Total N | N (%) with sub-phenotype | |
OA (Croft > 3) | ||||||
 Baseline | 285 | 22 (7.7) | 179 | 13 (7.3) | 106 | 9 (8.5) |
 Follow-up | 275 | 33 (12.0) | 173 | 24 (13.9) | 102 | 9 (8.8) |
 Incident | 257 | 18 (7.0) | 162 | 15 (9.3) | 95 | 3 (3.2) |
 Progressive | 18 | 5 (27.8) | 11 | 2 (18.2) | 7 | 3 (42.9) |
Hip replacement (identified on radiograph) | ||||||
 Baseline | 290 | 5 (1.7) | 184 | 5 (2.7) | 106 | 0 |
 Follow-up | 290 | 15 (5.2) | 184 | 11 (6.0) | 106 | 4 (3.8) |
 Incident | 285 | 10 (3.5) | 179 | 6 (3.4) | 106 | 4 (3.8) |
Osteophyte score | ||||||
 Baseline | 285 |  | 179 |  | 106 |  |
  0 |  | 203 (71.2) |  | 126 (70.4) |  | 77 (72.6) |
  1–4 |  | 75 (26.3) |  | 50 (27.9) |  | 25 (23.6) |
  > 5 |  | 7 (2.5) |  | 5 (2.8) |  | 4 (3.8) |
 Follow-up | 275 |  | 173 |  | 102 |  |
  0 |  | 161 (58.6) |  | 94 (54.3) |  | 67 (65.7) |
  1–4 |  | 105 (38.2) |  | 73 (42.2) |  | 32 (31.4) |
  > 5 |  | 9 (3.3) |  | 6 (3.5) |  | 3 (2.9) |
 Delta | 275 |  | 173 |  | 102 |  |
  < 1 |  | 201 (73.1) |  | 121 (69.9) |  | 80 (78.4) |
  1 |  | 48 (17.5) |  | 32 (18.5) |  | 16 (15.7) |
  > 1 |  | 26 (9.5) |  | 20 (11.6) |  | 6 (5.9) |
JSN score | ||||||
 Baseline | 285 |  | 179 |  | 106 |  |
  0 |  | 253 (88.8) |  | 160 (89.4) |  | 93 (87.7) |
  1–2 |  | 27 (9.5) |  | 16 (8.9) |  | 11 (10.4) |
  > 3 |  | 5 (1.8) |  | 3 (1.7) |  | 2 (1.9) |
 Follow-up | 275 |  | 173 |  | 102 |  |
  0 |  | 241 (87.6) |  | 149 (86.1) |  | 92 (90.2) |
  1–2 |  | 28 (10.2) |  | 20 (11.6) |  | 8 (7.8) |
  > 3 |  | 6 (2.2) |  | 4 (2.3) |  | 2 (2.0) |
 Delta | 275 |  | 173 |  | 102 |  |
  < 1 |  | 261 (94.9) |  | 161 (93.1) |  | 100 (98.0) |
  1 |  | 12 (4.4) |  | 10 (5.8) |  | 2 (2.0) |
  > 1 |  | 2 (0.7) |  | 2 (1.2) |  | 0 (0.0) |
| Â | All individuals | HBM individuals | Relatives without HBM | |||
Total N | Median (IQR) | Total N | Median (IQR) | Total N | Median (IQR) | |
WOMAC at follow-up | ||||||
 Pain | 145 | 0 (0, 25) | 92 | 10 (0, 35) | 53 | 0 (0, 15) |
 Function | 145 | 3.6 (0, 25) | 92 | 10.7 (0, 30.4) | 53 | 0 (0, 14.3) |
| Â | Total N | N (%) | Total N | N (%) | Total N | N (%) |
Hip replacement (self-reported) | 145 | 16 (11.0) | 92 | 13 (14.1) | 53 | 3 (5.7) |