Table 2.
Frequency of other comorbidities in the patient population
| Comorbidity | Number | Percentage |
|---|---|---|
| Additional comorbidities* | ||
| Steroid use | 3 | 0.4 |
| Bleeding disorder | 3 | 0.4 |
| Hematologic disorder | 3 | 0.4 |
| Diabetes | 1 | 0.1 |
| Premature birth | 1 | 0.1 |
| Immune disorder | 1 | 0.1 |
| Patients excluded† | ||
| Neuromuscular disorder | 195 | |
| ASA classification ≥ 3 | 94 | |
| Age younger than 11 years | 53 | |
| Incomplete/missing data | 51 | |
| Impaired cognitive status | 47 | |
| History of cardiac disease | 40 | |
| Seizure disorder | 7 | |
| Preexisting infection | 7 | |
| Malignancy | 5 | |
| Tracheostomy | 3 | |
| Cerebrovascular accident | 3 | |
| On ventilator | 2 | |
| Central nervous system tumor | 2 | |
| Organ transplant | 2 | |
| Oxygen support | 1 | |
| Marrow transplant | 1 | |
| Chemotherapy | 1 | |
ASA = American Society of Anesthesiologists
* Patients with these comorbidities were included in the study but the comorbidities were not analyzed separately because of their low incidence
†Patients with these comorbidities were excluded as these comorbidities suggested nonidiopathic scoliosis