Gradient boosting machine model predicts psychiatric complications after deep brain stimulation in Parkinson’s disease

Table 2 Comparison of perioperative-related indicators, mean ± SD

Items	Complication group (69 cases)	Non-complication group (94 cases)	t value	P value
NLR	2.41 ± 1.79	2.58 ± 2.06	0.542	0.589
Hemoglobin (g/L)	136.62 ± 15.05	138.85 ± 12.72	1.022	0.308
Albumin (g/L)	42.73 ± 6.75	42.35 ± 5.79	0.389	0.698
CRP (mg/L)	38.71 ± 12.61	39.37 ± 14.07	0.310	0.757
Operation time (minute)	267.36 ± 32.94	245.63 ± 32.57	4.189	< 0.001
Anesthesia time (minute)	288.61 ± 57.79	282.51 ± 51.46	0.709	0.479
Intraoperative blood loss (mL)	54.06 ± 13.43	53.40 ± 18.87	0.246	0.806
Fasting time (hour)	8.87 ± 0.87	7.84 ± 0.88	7.423	< 0.001
postoperative intracranial gas volume (mm3)	9.90 ± 3.46	7.42 ± 2.74	4.912	< 0.001

NLR: Neutrophil-to-lymphocyte ratio; CRP: C-reactive protein.