Table 1.
Baseline characteristics of patients
| Variables | First Visit Year | LSS | SPL | P-value |
|---|---|---|---|---|
| Number of patients | 2015 | 2,049 | 332 | |
| 2017 | 2,615 | 446 | ||
| Number of Female | 2015 | 1260 (61.5%) | 260 (78.3%)) | < 0.001* |
| 2017 | 1580 (60.4%) | 340 (76.2%) | < 0.001* | |
| Mean age | 2015 | 70.0 ± 9.6 | 66.8 ± 9.1 | < 0.001* |
| 2017 | 71.3 ± 9.8 | 69.4 ± 9.6 | < 0.001* | |
| Diagnosis of COVID-19 | 2015 | 22 (1.1%) | 6 (1.8%) | 0.381 |
| 2017 | 33 (1.3%) | 6 (1.3%) | 1 | |
| Diagnosis of DM | 2015 | 129 (6.3%) | 24 (7.2%) | 0.601 |
| 2017 | 184 (7.0%) | 41(9.2%) | 0.13 | |
| Diagnosis of tumor | 2015 | 231 (11.3%) | 45 (13.6%) | 0.266 |
| 2017 | 366 (14.0%) | 66(14.8%) | 0.707 |
Values are presented as mean ± standard deviation or number (%). Statistical analysis between the two groups by chi-square test or two sample t-test (Abbreviations: LSS, lumbar spinal stenosis; SPL, spondylolisthesis; DM, diabetes mellitus)