Table 4 Univariate potential predictors of hypoxia.
Characteristic | Hypoxia (n = 90) | Nohypoxia (n = 5223) | P value |
|---|---|---|---|
Age (years) | 45.29 ± 11.83 | 44.19 ± 10.62 | 0.333 |
Sex | 0.376 | ||
 Male | 55 | 2948 |  |
 Female | 35 | 2275 |  |
BMI (kg m2) | 0.167 | ||
  < 28 | 78 | 4748 |  |
  ≥ 28 | 12 | 475 |  |
ASA grade | 0.404 | ||
 1 grade | 39 | 2613 |  |
 2 grade | 38 | 2014 |  |
 3 grade | 13 | 596 |  |
Procedure time (min) | 33/57/0 | 1716/3584/23 | Â |
 ≤ 10 min | 33 | 1716 |  |
 > 10 min | 57 | 3607 | 0.252 |
Smoking | 0.140 | ||
 Yes | 4 | 473 |  |
 No | 86 | 4850 |  |
OSAS | 0.240 | ||
 Yes | 11 | 454 |  |
 No | 77 | 4769 |  |
