Table 1 Demographics
n = 61 | |||
|---|---|---|---|
Age, average, average (range), years | 61.9 ± 16.1 (20–90) | ||
Sex, female/male, No. | 21/40 | ||
Duration of disease, average (range), months | 17.6 ± 24.2 (1-144) | ||
Follow-up period, average (range), months | 32.1 ± 16.0 (12–60) | ||
Preoperative comorbidities, No. | HT | 18 (29.5%) | |
DM | 8 (13.1%) | ||
IHD | 9 (14.8%) | ||
Concurrent spinal canal stenosis, No. | Cervical [Non-C-OPLL/C-OPLL] | 23 (37.7%) [11 (18.0%)/12 (19.7%)] | |
Thoracic [T-OPLL] | 8 (13.1%) | ||
LCS [Spondylosis/Spondylolisthesis/L-OPLL] | 46(75.4%) [26 (42.6%)/18 (29.5%)/2 (3.3%)] | ||
Height, average (range), cm | 160.2 ± 10.1 (134–179) | ||
Body weight, average (range), Kg | 70.1 ± 19.2 (44.2-103.4) | ||
BMI, average (range), Kg/m2 | 27.2 ± 6.0 (17.6–52.4) | ||
Dual Energy X-ray Absorptiometry | Lumbar YAM, average (range), % | 103.2 ± 17.2 (75–147) | |
Femoral YAM, average (range), % | 83.7 ± 19.4 (66–137) | ||
MMT, average (range), | Preoperative | 3.3 ± 1.4 (0–5) | |
Operation | Surgical procedure | LAM/PDF, No | 44 (72.1%)/17 (27.9%) |
Decompressed OLF levels, average (range), No. | 1.5 ± 0.9 (1–4) | ||
Simultaneous lumbar decompression, No | 10 (16.4%) | ||
Operative time, average (range), min | 156.7 ± 97.6 (48–460) | ||
Blood loss, average (range), mL | 284.9 ± 606.8 (1-4090) | ||
Outcomes | T-JOA score, average (range), points | Preoperative | 5.9 ± 1.9 (2–10) |
Postoperative | 8.0 ± 1.6 (4.5–11)♰ | ||
Recovery rate of T-JOA score, average (range), % | 39.2 ± 29.2 (-10-100) | ||
VAS, average (range), mm | Preoperative | 72.2 ± 25.1 (0-100) | |
Postoperative | 52.7 ± 28.8 (0-100)♰ | ||
Complication, No | Dural tear | 3 (4.9%) | |
Hematoma | 2 (3.3%) | ||
Vertebral fracture | 1 (1.6%) | ||
SSI | 1 (1.6%) | ||
Enlargement of T-OPLL | 1 (1.6%) | ||
Radiological findings | Preoperative global spinal alignment | LL, average (range), degrees | 37.9 ± 15.2 (2–67) |
PI, average (range), degrees | 46.5 ± 7.6 (22–63) | ||
SS, average (range), degrees | 30.2 ± 10.1 (8–58) | ||
TLK, average (range), degrees | 11.6 ± 12.1 (-8-54) | ||
TK, average (range), degrees | 23.9 ± 11.7 (2–59) | ||
SVA, average (range), mm | 46.6 ± 51.3 (-54-183) | ||
Local kyphosis, average (range), degrees | Preoperative | 9.2 ± 8.4 (0–45) | |
Postoperative | 11.2 ± 9.4 (0–50) | ||
CT | DISH, No. | 19 (31.1%) | |
OLF, Unilateral/Bilateral/Bridged, No. | 12 (19.7%)/39 (63.9%)/10 (16.4%) | ||
Thickness of OLF, average (range), mm | 3.6 ± 2.0 (1–10) | ||
OLF segments, average (range), No. | 3.1 ± 2.5 (1–12) | ||
MRI | OLF, Round/Beak, No. | 37 (60.7%)/24 (39.3%) | |
Modic change, No. | 29 (47.5%) | ||
HIA, No. | 51 (83.6%) | ||