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. 2012 Nov 3;2012:1109–1118.

Table 2.

Search strategy results

Search Strategy Recall (%) Precision (%)
Strategy 2 (Vaginal Cases) 97 62
Strategy 2 (All Cases) 93 84
Strategy 3 (Vaginal Cases) 96 Not calculated
Strategy 3 (All Cases) 88 Not calculated
Strategy 4 (Vaginal Cases) 63 74

Strategy 2: Automated Refined Search Tokens

Strategy 3: Administrative Codes

Strategy 4: Automated Further Refined Search to Identify Vaginal Approach Cases