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BI-RADS 4 subgroups and its outcomes (malignant)
| BI-RADS score | PPV (%) | Odds ratio (OR) | 95% CI | P value |
|---|---|---|---|---|
| BI-RADS 4a | 34 | 0.044 | 0.015 to 0.123 | < 0.0001 |
| BI-RADS 4b | 89 | 4.75 | 1.78 to 12.66 | 0.0018 |
| BI-RADS 4c | 97 | 15.246 | 1.98 to 117 | 0.0088 |
PPV = positive predictive value, OR = odds ratio, CI = confidence interval (BI-RADS 4a = 72, 4b = 110, and 4c = 64, odds ratio calculated using univariate logistic regression, total cases (n) = 246)
