Table 1.

Half-width of CIs for differences in proportions between two groups with given sample size, placebo group, p=0.5 (created with PASS software REF—PASS V.15)

Difference	0.1	0.2	0.3	0.4	0.5
Width	0.398	0.392	0.382	0.337	0.347

The half-width of the 95% CI of the difference in means for continuous outcome will be 0.889 SD.