26 September 2024 : Database Analysis
Development and Internal Validation of Machine Learning to Predict Postoperative Worse Functional Status after Surgical Treatment for Thoracic Spinal Stenosis
Tun Liu12ABCE, Jia Li2D, Huaguang Qi3F, Bin Guo2B, Songchuan Zhao4CD, Baoping Zhang2F, Langbo Li5D, Gang Wu2A, Gang Wang1D*DOI: 10.12659/MSM.945310
Med Sci Monit 2024; 30:e945310
Table 1 Demographic, peri-operative, and intraoperative neuromonitoring (IONM) data of the patients (n=327).
| Variables | No. of patients |
|---|---|
| Age (years) (reference = <50 years) | |
| <50 | 164 |
| ≥50 | 163 |
| Sex (reference = male) | |
| Male | 171 |
| Female | 156 |
| BMI (kg/m) (reference = ≤24) | |
| ≤24 | 243 |
| >24 | 84 |
| Smoking (reference = no) | |
| Yes | 225 |
| No | 102 |
| Manual muscle testing in the lower extremities (reference = >III) | |
| ≥IV | 249 |
| ≤III | 78 |
| Preoperative JOA score (reference = ≥16) | |
| Mild (≥16) | 229 |
| Moderate (12 to 16) | 91 |
| Severe (≤12) | 7 |
| Ambulatory status preoperatively (reference = independent) | |
| Assistance | 22 |
| Independent | 305 |
| Preoperative deficit (reference = no) | |
| Bladder dysfunction (yes/no) | 14/313 |
| Motor dysfunction of the upper extremity (yes/no) | 0/327 |
| Motor dysfunction of the lower extremity (yes/no) | 78/249 |
| Sensory dysfunction of the upper extremity (yes/no) | 3/324 |
| Sensory dysfunction of the lower extremity (yes/no) | 64/263 |
| Sensory dysfunction of the trunk (yes/no) | 5/322 |
| Duration of symptoms (months) (reference = <6 months) | |
| ≤6 | 152 |
| >6 | 175 |
| Operated level (reference = “T–T”) | 21 |
| T–T | 71 |
| T–T | 235 |
| T–T | |
| No. of decompression level involved (reference = 1 or 2 levels) | |
| 1 or 2 levels | 64 |
| 3 or more levels | 263 |
| Poor quality of SSEP before surgery (yes/no; reference = no) | 45 |
| Poor quality of intraoperative SSEP/MEP baseline (reference = no) | |
| Poor quality of intraoperative SSEP baseline (yes/no) | 45 |
| Poor quality of intraoperative MEP baseline (yes/no) | 31 |
| Poor quality of intraoperative SSEP or MEP baseline (yes/no) | 63 |
| Poor quality of intraoperative SSEP and MEP baseline (yes/no) | 13 |
| Diabetes | 78 |
| Hypertension | 93 |
| Cerebral vascular disease | 16 |
| Acute coronary disease | 19 |
| Usage of anticoagulants and/or antiplatelet drugs | 25 |
| JOA – Japanese Orthopedic Association; IONM – intraoperative neuromonitoring, MEP – motor-evoked potentials; SSEP – somatosensory-evoked potentials; BMI – body mass index. | |