Skip to main content

Table 2 Sample size considerations

From: Procalcitonin, pyuria and proadrenomedullin in the management of urinary tract infections – ‘triple p in uti’: study protocol for a randomized controlled trial

Time 1

Time 2

Power

Alpha-level

SD

Number per group

10

8

0.8

0.05

4

63

10

8

0.8

0.05

5

99

10

8

0.8

0.05

6

142

10

9

0.8

0.05

4

252

10

9

0.8

0.05

5

393

10

9

0.8

0.05

6

566

6

4.5

0.8

0.05

4

112

6

4.5

0.8

0.05

5

175

6

4.5

0.8

0.05

6

252

6

5

0.8

0.05

4

252

6

5

0.8

0.05

5

393

6

5

0.8

0.05

6

566