Prevalence and multivariable factors associated with inadvertent intraoperative hypothermia in video-assisted thoracoscopic surgery: a single-center retrospective study

Table 2 Univariate logistic regression for inadvertent intraoperative hypothermia rates

	β	Wald	Odds ratio	95% confidence interval		P value
Age (per decade)	.256	27.188	1.292	1.173	1.423	.000*
Female	.223	3.623	1.250	.993	1.574	.057
BMI (kg/m²)	−.100	26.662	.905	.871	.940	.000*
< 24	.475	15.985	1.607	1.274	2.029	.000*
BSA (m²)	−2.101	36.946	.122	.062	.241	.000*
≤ 1.83	.491	17.293	1.633	1.296	2.058	.000*
ASA
I	/	1.319	/	/	/	.517
II	.114	.538	1.120	.827	1.517	.463
III	.301	1.265	1.352	.799	2.285	.261
Duration of Preparation (min)	.019	23.995	1.019	1.012	1.027	.000*
> 1 h	.587	23.160	1.798	1.416	2.283	.000*
Surgery in the morning	.696	34.122	2.007	1.588	2.535	.000*
Duration of Surgery (min)	.009	45.492	1.009	1.007	1.012	.000*
> 2 h	.781	40.642	2.184	1.718	2.777	.000*
Time in OR (min)	.008	46.178	1.008	1.006	1.010	.000*
> 3 h	.872	53.239	2.392	1.892	3.023	.000*
OR temperature (°C)	−.388	11.685	.678	.543	.847	.001*
OR humidity (%)	.026	11.132	1.026	1.011	1.042	.001*
Type of Surgery
lobectomy	/	28.149	/	/	/	.000
wedge resection	−.653	25.264	.520	.403	.671	.000*
mediastinum	−.505	6.577	.604	.410	.888	.010*
others	−.701	3.572	.496	.240	1.026	.590
Type of Anesthesia
general anesthesia alone	/	26.221	/	/	/	.000
PVB before intubation	−.268	3.842	.765	.585	1.000	.050*
PVB after intubation	1.022	13.747	2.779	1.619	4.769	.000*

BMI body mass index, BSA body surface area, BSA = 0.0061*height (cm) + 0.0124*weight (kg)-0.0099; ASA American Society of Anesthesiologists physical status, OR operating room, PVB paravertebral block
Time in OR refers to minutes from arrival in OR to leaving OR

ISSN: 1471-2253