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Table 1 Sample sizes of records and practices as determined by different MDO rates

From: Missed diagnostic opportunities and English general practice: a study to determine their incidence, confounding and contributing factors and potential impact on patients through retrospective review of electronic medical records

Scenario

True MDO rate (%)

Number of practices (phases 1 + 2)

Number of records per practice

Total number of records reviewed

Expected number of detected MDOs

95 % CI on the estimated MDO rate

1

1

50

250

12500

100

0.4-1.6

2

5

50

100

5000

200

3.5-6.5

3

10

40

100

4000

320

7.7-12.3