Electroencephalogram-guided anesthesia and postoperative anxiety and depression in elderly gastric cancer patients with sleep disorders

Table 3 Gradient effect of electroencephalogram-guided anesthesia on postoperative psychological outcomes across sleep disorder severity spectrum, mean ± SD

Sleep disorder severity	Measure	Electroencephalogram group	Control group	t value	P value
Severe	HADS-A	5.9 ± 1.8	8.6 ± 2.1	-5.32	< 0.001
	HADS-D	6.4 ± 1.6	8.2 ± 1.9	-4.06	< 0.001
	HADS total	12.3 ± 3.1	16.8 ± 3.4	-5.48	< 0.001
Moderate	HADS total	10.7 ± 2.9	14.2 ± 3.2	-5.67	< 0.001
Mild	HADS-A	4.5 ± 1.7	5.3 ± 1.9	-2.04	0.045
	HADS-D	5.0 ± 1.5	6.4 ± 1.7	-4.03	< 0.001
	HADS total	9.5 ± 2.6	11.7 ± 2.8	-3.64	0.023

HADS: Hospital Anxiety and Depression Scale.