Effect of motivational interviewing on postoperative weight control in patients with obstructive sleep apnea-hypopnea syndrome

Table 2 Comparison of obesity-related indicators between the two groups of patients before and after intervention (mean ± SD)

Item	Before intervention		t	P value	After intervention		t	P value
	Control group (n = 42)	Intervention group(n = 46)			Control group (n = 42)	Intervention group (n = 46)
Weight	85.81 ± 13.13	84.13 ± 14.98	0.557	0.579	85.33 ± 12.94	79.80 ± 12.62	2.028	0.046a
BMI	33.64 ± 2.30	33.72 ± 2.30	-0.165	0.869	33.88 0± 2.45	31.937 ± 3.15	3.229	0.002 a
Waist circumference	101.52 ± 11.83	98.41 ± 10.29	1.319	0.191	101.33 ± 11.81	95.91 ± 10.63	2.267	0.026a
Neck circumference	41.21 ± 4.57	40.65 ± 4.29	0.595	0.553	40.75 ± 4.40	38.70 ± 4.57	0.612	0.035a
Hip circumference	106.79 ± 7.16	107.54 ± 6.96	-0.503	0.616	106.57 ± 7.20	104.91 ± 7.31	1.071	0.287

^aP < 0.05. BMI: Body mass index.