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Table 1 Power for different outcomes and significance levels

From: Multimodal analysis of the effects of dexamethasone on high-altitude cerebral oedema: protocol for a pilot study

Outcome

Estimates from Sagoo et al. [3]

Power

Difference

Standard deviation

α = 0.05

α = 0.10

α = 0.20

Blood oxygen content, ml O2/dL blood

2.05

1.33

97

98

99

Whole-brain ADC ×  10–4/mm3

0.5

0.45

78

86

93

Corpus callosum (genu) ADC × 10–4/mm3 (mean of right and left)

1.35

1.65

52

64

77

  1. ADC apparent diffusion coefficient
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Trials

ISSN: 1745-6215