Table 4.

Factors associated with OQS based on the CONSORT statement

Variables	Univariate analysis	P	Multivariate analysis	P
	Coefficient (95% CI)		Coefficient (95% CI)
Main effect of the primary outcome	1.833 (−0.570–4.236)	0.134	/
Significant vs non-significant
Author’s affiliation	−1.896 (−3.832–0.040)	0.055	−1.131 (−2.780to 0.518)	0.177
Hospital vs other
Center	2.699 (1.042–4.356)	0.002	1.306 (−0.1476to 2.760)	0.078
Multicenter vs single center
Sample size	0.418 (−0.915–1.751)	0.536	/
<80 vs ≧80
Year	2.627 (1.206–4.048)	<0.001	2.394 (1.168–3.620)	<0.001
Before 2010 vs after 2010
Funding	5.323 (3.901–6.746)	<0.001	4.456 (3.009–5.903)	<0.001
yes vs no