Research Article
Decision Tree Analysis: A Retrospective Analysis of Postoperative Recurrence of Adhesions in Patients with Moderate-to-Severe Intrauterine
Table 1
Attribute variables or category descriptions of factors influencing the recurrence of intrauterine adhesions.
| | Data type | Encoding |
| Recurrence of adhesions | Binary classification | No; yes |
| Age (y) | Continuous variable | — | Times of pregnancy | Frequency | — | Childbirth | Binary classification | No; yes | Menstrual pattern | Quadruple classification | z = 0, a ≤ 1/4, b = 1/4–1/2, c ≥ 1/2 |
| Etiology | Tripartite classification | a = termination of early pregnancy; b = termination of mid-late pregnancy; c = nonpregnancy-related factors |
| Pregnancies lost (n) | Tripartite classification | z = 0, a = 1, b ≥ 2 | Intrauterine operations (n) | Frequency | — |
| Previous TCRA | Binary classification | No; yes | Endometrial thickness (mm) | Tripartite classification | a ≤ 3 mm, b = 4–6 mm, c = ≥7 mm |
| Uterine volume (cm3) | Continuous variable | — | AFS score | Continuous variable | — |
| Degree of adhesion | Two classifications | a = moderate intrauterine adhesions, b = severe intrauterine adhesions |
| Adhesion type | Two classifications | a = mixed type, b = peripheral type | Intrauterine depth | Continuous variable | — |
| Uterine horn closure | Tripartite classification | z = 0 side, a = 1 side, b = 2 sides | Tubal ostia | Tripartite classification | z = 0 side, a = 1 side, b = 2 sides |
| Isolation barrier | Tripartite classification | a = Foley balloon, b = intrauterine suitable balloon, c = intrauterine contraceptive device |
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