Table 3.

Sample sizes for various combinations of baseline (p) and follow-up (r) measures. Correlations for pre, post and mix are 0.7, 0.7 and 0.5. 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%	94%	92%	90%	89%	89%	88%	88%	88%	88%	87%	87%
2	80%	74%	72%	70%	69%	69%	68%	68%	68%	68%	67%	67%
3	73%	67%	65%	64%	63%	62%	62%	61%	61%	61%	61%	60%
4	70%	64%	62%	60%	59%	59%	58%	58%	58%	58%	57%	57%
5	68%	62%	60%	58%	57%	57%	56%	56%	56%	56%	55%	55%
6	67%	61%	58%	57%	56%	56%	55%	55%	55%	54%	54%	54%
7	66%	60%	57%	56%	55%	55%	54%	54%	54%	53%	53%	53%
8	65%	59%	57%	55%	54%	54%	53%	53%	53%	53%	52%	52%
9	64%	59%	56%	55%	54%	53%	53%	53%	52%	52%	52%	51%
10	64%	58%	56%	54%	53%	53%	52%	52%	52%	52%	51%	51%
12	63%	57%	55%	54%	53%	52%	52%	51%	51%	51%	51%	50%
15	63%	57%	54%	53%	52%	52%	51%	51%	51%	50%	50%	50%