Table 5.

Sample sizes for various combinations of baseline (p) and follow-up (r) measures. Correlations for pre, post and mix are 0.9, 0.9 and 0.8. Results given relative to a trial with a single baseline and follow-up measure.

	Number of baseline measures (p)
No. of follow-up measures (r)	1	2	3	4	5	6	7	8	9	10	12	15
1	100%	91%	87%	86%	85%	84%	83%	83%	83%	82%	82%	82%
2	86%	77%	73%	72%	71%	70%	69%	69%	69%	69%	68%	68%
3	81%	72%	69%	67%	66%	65%	65%	64%	64%	64%	64%	63%
4	79%	70%	66%	65%	64%	63%	63%	62%	62%	62%	61%	61%
5	78%	68%	65%	63%	62%	62%	61%	61%	60%	60%	60%	59%
6	77%	67%	64%	62%	61%	61%	60%	60%	60%	59%	59%	59%
7	76%	67%	63%	62%	61%	60%	60%	59%	59%	59%	58%	58%
8	76%	66%	63%	61%	60%	60%	59%	59%	58%	58%	58%	57%
9	75%	66%	63%	61%	60%	59%	59%	58%	58%	58%	57%	57%
10	75%	66%	62%	61%	60%	59%	58%	58%	58%	57%	57%	57%
12	75%	65%	62%	60%	59%	58%	58%	57%	57%	57%	57%	56%
15	74%	65%	61%	60%	59%	58%	57%	57%	57%	56%	56%	56%