. 2012 Jan-Feb;32(1):37–42. doi: 10.5144/0256-4947.2012.37

Table 2.

Analysis of serum uric acid and lactate variables in obstructive sleep apnea syndrome patients and controls.

Variable parameters	Group	Mean value	Standard deviation	P value (Mann-Whitney U test)

Serum uric acid before sleep (b)	Control	5.38	1.12	.001
Serum uric acid before sleep (b)	OSAS	7.54	1.63	.001
Serum uric acid after sleep (a)	Control	5.30	1.43	.002
Serum uric acid after sleep (a)	OSAS	7.66	2.10	.002
Serum uric acid change (a–b)	Control	−0.07	0.70	.27
Serum uric acid change (a–b)	OSAS	0.18	1.07	.27
Plasma lactate before sleep (b′)	Control	1.46	0.62	.2
Plasma lactate before sleep (b′)	OSAS	1.74	0.60	.2
Plasma lactate after sleep (a′)	Control	1.53	0.89	.03
Plasma lactate after sleep (a′)	OSAS	2.28	0.98	.03
Plasma lactate change (a′–b′)	Control	−0.19	0.64	.02
Plasma lactate change (a′–b′)	OSAS	0.56	0.94	.02

a: after sleep, b: before sleep