Scientific Letters
نویسندگان
چکیده
The preliminary results were validated in a prospective series of 353 women. The only difference was that two fingerbreadths tallied with a gestational age of 8 9 weeks (instead of 9 10 weeks). There were 18 false-negatives (5.1%) and 31 false-positives (8.8%). The false-negatives occurred at a mean gestational age of 7.9 weeks (95% confidence interval (CI): 7.1, 8.7). The sensitivity was 93.2% and the specificity 65.6%. The positive predictive value was 88.8% and the negative predictive value 76.6%. Because some women with one or two fingerbreadths and a full bladder were found to be false-positive, it is recommended that these clients be asked to void, and that the clinical examination be repeated.
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