**Data Input for Sample Size Estimation** is a table of 4 columns

- Each row contains data from a separate study
- Col 1 = probability of Type I error (alpha)
- Col 2 = power (1-beta)
- Col 3 = proportion expected in grp 1
- Col 4 = proportion expected in grp 2

**Data Input for Power Estimation** is a table of 5 columns

- Each row contains data from a separate study
- Col 1 = probability of Type I error (alpha)
- Col 2 = sample size in group 1
- Col 3 = proportion found in group 1
- Col 4 = sample size in group 2
- Col 5 = proportion found in group 2

**Data Input for Confidence Interval Study** is is a table of 5 columns

- Each row contains data from a separate study
- Col 1 = percent confidence (usually 95)
- Col 2 = sample size in group 1
- Col 3 = proportion found in group 1
- Col 4 = sample size in group 2
- Col 5 = proportion found in group 2

**Data Input for Pilot Study** is for a single plan, a single column with 5 rows

- Row 1 : Percent Confidence required, usually 95 or 99
- Row 2 : Planned Proportion in Group 1
- Row 3 : Planned Proportion in Group 2
- Row 4 : Sample Size Interval, usually 5
- Row 5 : Maximum Sample size, usually 50

Machin D, Campbell M, Fayers, P, Pinol A (1997) Sample Size Tables for
Clinical Studies. Second Ed. Blackwell Science IBSN 0-86542-870-0 p. 18-20