Table 1 Characteristics of patients with ONFH and controls
Variable | Cases | Control | p |
|---|---|---|---|
N | 498 | 498 | |
Age (year, mean ± SD) | 51.77 ± 14.55 | 50.38 ± 14.52 | 0.132 |
> 51 | 273 (54.8%) | 236 (47.4%) | |
≤ 51 | 225 (45.2%) | 262 (52.6%) | |
Gender | |||
Males | 280 (56.2%) | 311 (62.4%) | 0.046 |
Females | 218 (43.8%) | 187 (37.6%) | |
Smoking | |||
Yes | 219 (44.0%) | 269 (54.0%) | 0.002 |
No | 279 (56.0%) | 229 (46.0%) | |
Alcohol consumption | |||
Yes | 265 (53.2%) | 256 (51.4%) | 0.568 |
No | 233 (46.8%) | 242 (48.6%) | |
Stage | |||
III/IV | 192 (38.6%) | ||
I/II | 67 (13.5%) | ||
Missing | 235 (47.2%) | ||
RBC (109/L) | 3.91 ± 0.83 | 4.90 ± 0.48 | < 0.001 |
WBC (109/L) | 7.67 ± 2.53 | 5.94 ± 1.59 | < 0.001 |
Hemoglobin (g/L) | 118.35 ± 20.11 | 149.76 ± 17.03 | < 0.001 |
Platelet (109/L) | 197.74 ± 72.79 | 222.23 ± 58.94 | < 0.001 |
Leukocyte (109/L) | 1.60 ± 0.65 | 1.87 ± 0.59 | < 0.001 |
Monocytes (109/L) | 0.55 ± 0.26 | 0.42 ± 0.16 | < 0.001 |
Serum uric acid (μmol/L) | 266.67 ± 88.17 | 322.64 ± 80.7 | 0.337 |
Urea (μmol/L) | 5.29 ± 5.35 | 5.06 ± 1.27 | < 0.001 |
Creatinine (μmol/L) | 57.32 ± 16.53 | 67.65 ± 12.57 | < 0.001 |