The trial was designed as an equivalence trial,
Single Reading with Computer-Aided Detection for Screening Mammography
ハイフンを使って形容詞を作るときの参考にしましょう。computer-aidingではないことに注意します（迷いますが）。detection aided by computerと考えるとわかりやすいかも。
Background The sensitivity of screening mammography for the detection of small breast cancers is higher when the mammogram is read by two readers rather than by a single reader. We conducted a trial to determine whether the performance of a single reader using a computer-aided detection system would match the performance achieved by two readers.
conducted a trial トライアルを行った
match the performance 成績に匹敵する
Methods The trial was designed as an equivalence trial, with matched-pair comparisons between the cancer-detection rates achieved by single reading with computer-aided detection and those achieved by double reading. We randomly assigned 31,057 women undergoing routine screening by film mammography at three centers in England to double reading, single reading with computer-aided detection, or both double reading and single reading with computer-aided detection, at a ratio of 1:1:28. The primary outcome measures were the proportion of cancers detected according to regimen and the recall rates within the group receiving both reading regimens.
The trial was designed as 試験は～としてデザインされた
an equivalence trial 同等性試験
double reading 二重読影
at a ratio of ～の割合で
the recall rates 要再検率
Results The proportion of cancers detected was 199 of 227 (87.7%) for double reading and 198 of 227 (87.2%) for single reading with computer-aided detection (P=0.89). The overall recall rates were 3.4% for double reading and 3.9% for single reading with computer-aided detection; the difference between the rates was small but significant (P<0.001). The estimated sensitivity, specificity, and positive predictive value for single reading with computer-aided detection were 87.2%, 96.9%, and 18.0%, respectively. The corresponding values for double reading were 87.7%, 97.4%, and 21.1%. There were no significant differences between the pathological attributes of tumors detected by single reading with computer-aided detection alone and those of tumors detected by double reading alone.
There were no significant differences between ～間に有意さはなかった
Conclusions Single reading with computer-aided detection could be an alternative to double reading and could improve the rate of detection of cancer from screening mammograms read by a single reader.
an alternative 代替法
NEJMのサイトはThe New England Journal of Medecineで見られます。abstractは無料で閲覧できますから、どうぞ。