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Table 1 Statistical analysis

From: Preoperative and intraoperative assessment of myometrial invasion in patients with FIGO stage I non-endometrioid endometrial carcinoma—a large-scale, multi-center, and retrospective study

Statistical method

Definition

Sensitivity

True positive rate, TPR = TP/ (TP + FN)

Specificity

True negative rate, TNR = TN/ (FP + TN)

PPV

Positive predictive value = TP/ (TP + FP)

NPV

Negative predictive value = TN/ (TN + FN)

Accuracy

 = TP + TN/ (TP + FN + FP + TN)

Cohen’s Kappa

Consistency; unordered dichotomous variables (kappa ≤ 0, consistency less than chance; kappa ≤ 0.20, slight consistency; kappa = 0.21–0.40, fair consistency; kappa = 0.41–0.60, moderate consistency; kappa = 0.61–0.80, substantial consistency; kappa > 0.8, almost perfect consistency)

Cronbach’s α—inter rate correlation

Consistency; ordered classified variables (value > 0.90, high correlation; value = 0.8–0.9, acceptable correlation; value = 0.70–0.8, scale needs amending; value < 0.7, discard)

  1. TP True positive, TN True negative, FP False positive, FN False negative