Table 3 Relationships between POV risk with the anesthesia groups (TIVA or volatile anesthesia) and other factors using uni- and multivariate logistic regression analyses.
|  | POV +  | POV − | Univariate | Multivariate | ||
|---|---|---|---|---|---|---|
(n = 16) | (n = 66) | OR (95% CI) | P value | OR (95% CI) | P value | |
Anesthesia | Â | Â | Â | 0.585 | Â | 0.741 |
  TIVA | 9 (56.25%) | 42 (63.6%) | Reference |  | Reference |  |
  Volatile anesthetics | 7 (43.75%) | 24 (36.4%) | 1.36 (0.45–4.12) |  | 0.78 (0.17–3.52) |  |
Sex | Â | Â | Â | 0.933 | Â | 0.395 |
  Male | 6 (37.5%) | 24 (36.4%) | Reference |  | Reference |  |
  Female | 10 (62.5%) | 42 (63.6%) | 0.95 (0.31–2.95) |  | 2.06 (0.39–10.89) |  |
Smoking | Â | Â | Â | 0.828 | Â | 0.82 |
  Yes | 2 (12.5%) | 7 (10.6%) | Reference |  | Reference |  |
  No | 14 (87.5%) | 59 (89.4%) | 0.83 (0.16–4.44) |  | 0.79 (0.10–5.97) |  |
Age | 26.3 | 25.5 | 1.01 (0.95–1.07) | 0.751 | 1.06 (0.97–1.15) | 0.222 |
BMI (kg/m2) | 21.7 | 21.2 | 1.08 (0.87–1.34) | 0.495 | 1.11 (0.82–1.52) | 0.496 |
Surgical time (min) | 188.4 | 171.4 | 1.01 (1.00–1.03) | 0.085 |  |  −  |
Anesthesia time (min) | 306.6 | 297.3 | 1.01 (0.99–1.02) | 0.400 | 1.01 (0.99–1.03) | 0.383 |
Use of opioids | ||||||
  Fentanyl (μg) | 335.9 | 280.3 | 1.44 (1.02–2.05) | 0.039* | 1.71 (1.10–2.65) | 0.017* |
  Remifentanil (μg) | 4733.9 | 4744.1 | 1.00 (0.96–1.04) | 0.979 | 0.98 (0.92–1.06) | 0.652 |
In–out balance | 1318.4 | 1361.1 | 0.99 (0.90–1.09) | 0.795 |  | – |
Infusion (mL) | 2417.5 | 2534.9 | 0.98 (0.90–1.06) | 0.559 | 0.96 (0.85–1.08) | 0.501 |
Out (mL) | 1099.1 | 1173.8 | 0.98 (0.89–1.08) | 0.666 |  | – |
  Bleeding (mL) | 300.9 | 245.8 | 1.02 (0.99–1.05) | 0.232 | 1.01 (0.97–1.06) | 0.518 |
  Urine (mL) | 798.1 | 928 | 0.96 (0.87–1.07) | 0.454 | 0.98 (0.82–1.18) | 0.831 |
