7.4 mm) had 81% sensitivity and 97% specificity for prediction of post-menstrual spotting with overall accuracy was 88.7%. While scar width (> 12.8 mm) had 71% sensitivity and 97% specificity for prediction of post-menstrual spotting with overall accuracy was 83.3%. Scar volume (> 0.15 cm3) had 97% sensitivity and 100% specificity for prediction of post-menstrual spotting with overall accuracy was 98.4%. Conclusion MRI measures (CS scar volume, depth, and width) are predictors for postmenstrual spotting in patients with CS scar niche, and scar volume is the most powerful predictor."/>
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Table 1 Correlation of spotting duration with the radiological evaluation of the scar niche

From: Prediction of the relationship of cesarean section scar niche and postmenstrual spotting: is there any relation?

Correlation of post-menstrual spotting duration with r value P value
CS scar length (mm) 0.16 0.37
CS scar depth (mm) 0.41 < 0.001**
CS width (mm) 0.51 < 0.001**
Distance of CS scar (cm)
From cervix 0.11 0.54
From fundus 0.25 0.16
CS scar volume (cm3) 0.49 < 0.001**
Minimal scar thickness (mm) 0.01 0.92
Relative change (%) 0.18 0.32
  1. CS: Cesarean section
  2. **Statistically significant