Does Continuous Positive Airway Pressure Therapy in Patients with Obstructive Sleep Apnea Improves Uric Acid? A Meta-Analysis

Table 1

Characteristics of included studies (5 studies, 6 cohorts).

First author	Year	Nation	Sample size/male	Inclusion criteria	Daily duration (h/night)	CPAP duration	Study design
Sahebjami	1998	USA	20/20	OSAHS (NR)	NR	1 D	SCT
Steiropoulos (≥4 h)	2009	Greece	32/32		≥4 h	6 M	SCT
Steiropoulos (<4 h)	2009	Greece	20/20		<4 h	6 M	SCT
Prudon	2013	UK	19/19	, with	<4 h	3 M	RCT
Seetho	2015	UK	28/16		≥4 h	14 M	SCT
Campos-Rodriguez	2018	Spanish	151/0		≥4 h	3 M	RCT

Abbreviation: CPAP: continuous positive airway pressure, AHI: apnea-hypopnea index, ODI: oxygen desaturation index, ESS: epworth sleepiness scale, M: month, D: day, h: hour, NR: not reported, SCT: self-control trials, RCT: randomized controlled trials.