Table 4.

Sample sizes for various combinations of baseline (p) and follow-up (r) measures. Correlations for pre, post and mix are 0.5, 0.5 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%	89%	83%	80%	78%	76%	75%	74%	73%	73%	72%	71%
2	67%	56%	50%	47%	44%	43%	42%	41%	40%	39%	38%	38%
3	56%	44%	39%	36%	33%	32%	31%	30%	29%	28%	27%	26%
4	50%	39%	33%	30%	28%	26%	25%	24%	23%	23%	22%	21%
5	47%	36%	30%	27%	24%	23%	22%	21%	20%	19%	18%	18%
6	44%	33%	28%	24%	22%	21%	19%	19%	18%	17%	16%	15%
7	43%	32%	26%	23%	21%	19%	18%	17%	16%	16%	15%	14%
8	42%	31%	25%	22%	19%	18%	17%	16%	15%	14%	13%	13%
9	41%	30%	24%	21%	19%	17%	16%	15%	14%	13%	13%	12%
10	40%	29%	23%	20%	18%	16%	15%	14%	13%	13%	12%	11%
12	39%	28%	22%	19%	17%	15%	14%	13%	12%	12%	11%	10%
15	38%	27%	21%	18%	16%	14%	13%	12%	11%	11%	10%	9%