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Table 3 comparison of the yield in CIN2+ from random biopsies in women with the three different types of transformation zones

From: Can biopsies be omitted after normal colposcopy in women referred with low-grade cervical cytology? A prospective cohort study

Yield in CIN2+ from random biopsies in women with three different transformations zones
Diagnosis Biopsy 1 Biopsy 1 + 2 Biopsy 1 + 2 + 3 Biopsy 1 + 2 + 3 + 4
n % (95%CI) n % (95%CI) n % (95%CI) n % (95%CI)
TZ type 1
(n = 100)
17 17.0 (10.2–25.8) 25 25.0 (16.9–34.7) 28 28.0 (19.5–37.9) 34 34.0 (24.8–44.2)
TZ type 2
(n = 26)
2 7.7 (0.9–25.1) 2 7.7 (0.9–25.1) 2 7.7 (0.9–25.1) 3 11.5 (2.4–30.2)
TZ type 3
(n = 47)
0 0 (0–0) 0 0 (0–0) 0 0 (0–0) 1 2.1 (0.1–11.3)