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Table 3 Cross link among both validation exercises excluding unknown cases from questionnaires

From: Feasibility study to identify women of childbearing age at risk of pregnancy not using any contraception in The Health Improvement Network (THIN) database

Free text comments PCP questionnaire Gold Standard
Confirmed Cases Non confirmed cases Total
Confirmed cases 33 6 39
Non confirmed cases 0 1 1
Total 33 7 40