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Table 1 Study power calculations at various assumptions

From: Bladder pain syndrome: validation of simple tests for diagnosis in women with chronic pelvic pain: BRaVADO study protocol

   

Sample size

Sensitivity

Sensitivity to exclude

No. of patients with BPS

Total number of patients

40% prevalence

50% prevalence

60% prevalence

60%

45%

82

205

164

137

65%

50%

78

195

156

130

70%

55%

76

190

152

127

75%

60%

73

183

146

122

80%

65%

69

173

132

115