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Table 1 Sample sizes required to provide nominal statistical power for 50% treatment effect within subject.

From: The impact of obstructive sleep apnea variability measured in-lab versus in-home on sample size calculations

  ARES PSG
Assumption 1-β = .80 1-β = .90 1-β = .80 1-β = .90
No bias, no reliability 24 31 57 76
No bias, observed reliability 10 13 27 35
Observed bias, no reliability 26 34 3,499 4,684
Observed bias, observed reliability 11 14 1,541 2,062
  1. Assumed α = .05 *Nearest whole number sample size to generate, at minimum, the nominal value.