. Author manuscript; available in PMC: 2016 Mar 1.

Published in final edited form as: Contemp Clin Trials. 2014 Dec 31;41:45–54. doi: 10.1016/j.cct.2014.12.020

Table 2. Statistical power for a range of hypothesized effect sizes^*.

No exposure N=250	One exposure N=150	2 or more exposures N=100	Statistical Power^**
0.00 (reference)	0.00	-0.50	98%
0.00	0.00	-0.45	95%
0.00	0.00	-0.40	90%
0.00	0.00	-0.35	81%
0.00	-0.10	-0.50	97%
0.00	-0.10	-0.45	93%
0.00	-0.10	-0.40	86%
0.00	-0.10	-0.35	76%

Effect sizes for those with one exposure and 2 or more exposures are expressed in standard deviation units with the no exposure group as the reference.

^**

Statistical power for 2 degree of freedom test using alpha=0.05 to compare anesthesia exposure groups using one-way ANOVA.

Table 2. Statistical power for a range of hypothesized effect sizes*.

Table 2. Statistical power for a range of hypothesized effect sizes^*.