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Table 1 Sample size calculation based on previous literature

From: A randomized controlled trial comparing lifestyle intervention to letrozole for ovulation in women with polycystic ovary syndrome: a study protocol

Range of reported

ovulation rates

Letrozole ovulation rate

Lifestyle ovulation rate

Total sample size needed

Lowest

62%a

38%b

130

Highest

86%c

67%d

150

Median

70%

50%

182

  1. aLegro et al. [29]
  2. bPalomba et al. [36]
  3. cZeinalzadeh et al. [37]
  4. dKarimzadeh and Javedani [38]