The methodological quality assessment of systematic reviews/meta-analyses of chronic prostatitis/chronic pelvic pain syndrome using AMSTAR2

Table 3 Univariable analysis of potential factors affecting the methodologic quality of SRs/MAs of CP/CPPS (N = 45)

Characteristics	N (%) (N = 45)	Total (N = 45)			P value
Characteristics	N (%) (N = 45)	M (N = 2)	L (N = 3)	CL (N = 40)	P value
Publication year					1.000
Before 2010	7 (15.6)	0 (0.0)	0 (0.0)	7 (100.0)
After 2010	38 (84.4)	2 (5.3)	3 (7.9)	33 (86.8)
Continent					0.027
Asia	29 (64.4)	0 (0.0)	2 (6.9)	27 (93.1)
Europe	6 (13.4)	2 (33.3)	0 (0.0)	4 (66.7)
North America	8 (17.8)	0 (0.0)	0 (0.0)	8 (100.0)
South America	2 (4.4)	0 (0.0)	1 (50.0)	1 (50.0)
PRISMA					0.589
No	15 (33.3)	1 (6.7)	0 (0.0)	14 (93.3)
Yes	30 (66.7)	1 (3.3)	3 (10.0)	26 (86.7)
Preregistration					0.004
No	29 (64.4)	0 (0.0)	0 (0.0)	29 (100.0)
Yes	16 (35.6)	2 (12.5)	3 (18.8)	11 (68.8)
Funding support					0.791
No	21 (46.7)	1 (4.8)	2 (9.5)	18 (85.7)
Yes	24 (53.3)	1 (4.2)	1 (4.2)	22 (91.6)
RCT enrollment					0.590
non-RCTs	5 (11.1)	0 (0.0)	1 (20.0)	4 (80.0)
RCTs	29 (64.4)	2 (6.9)	2 (6.9)	25 (86.2)
RCTs and non-RCTs	11 (24.4)	0 (0.0)	0 (0.0)	11 (100.0)
Whether CDSR					0.087
non-CDSR	40 (88.9)	1 (2.5)	2 (5.0)	37 (92.5)
CDSR	5 (11.1)	1 (20.0)	1 (20.0)	3 (60.0)
Meta-analysis					0.431
Without	9 (20.0)	1 (11.1)	0 (0.0)	8 (88.9)
With	36 (80.0)	1 (2.8)	3 (8.3)	32 (88.9)

ISSN: 1471-2288