The quality of reporting of RCTs used within a postoperative pain management meta-analysis, using the CONSORT statement

Table 5 Regression analysis for the Key Methodology Item Score ^a in 23 RCTs

Predictor variable	IRR	95% CI	Pvalue
Sample Size^b	2.383	(0.191, 29.665)	0.500
Impact Factor	2.022	(0.742, 5.509)	0.169
Journal adopted CONSORT Statement at the time of data collection.	0.517	(0.148, 1.803)	0.301
Funding reported	1.766	(0.619, 5.040)	0.288

CI: Confidence Interval; IRR: Incidence Rate Ratio.
^a Maximum Possible Score for the Key Methodology Item = 3.
^b The sample size variable was log(10) transformed. The value is an expression of the change in the average of the KMIS due to one unit increase in sample size in the log scale.