Recall | \( \frac{\#\mathrm{included}\ \mathrm{references}\ \mathrm{retrieved}\ \mathrm{by}\ \mathrm{a}\ \mathrm{database}/\mathrm{combination}}{\#\mathrm{included}\ \mathrm{references}\ \mathrm{retrieved}\ \mathrm{by}\ \mathrm{a}\mathrm{ll}\ \mathrm{database}\mathrm{s}} \) |
Precision | \( \frac{\#\mathrm{included}\ \mathrm{references}\ \mathrm{retrieved}\ \mathrm{by}\ \mathrm{a}\ \mathrm{database}/\mathrm{combination}}{\#\mathrm{total}\ \mathrm{references}\ \mathrm{retrieved}\ \mathrm{by}\ \mathrm{those}\ \mathrm{database}\left(\mathrm{s}\right)} \) |
Number Needed to Read | \( \frac{\#\mathrm{total}\ \mathrm{references}\ \mathrm{retrieved}\ \mathrm{by}\ \mathrm{a}\ \mathrm{database}/\mathrm{combination}}{\#\mathrm{included}\ \mathrm{references}\ \mathrm{retrieved}\ \mathrm{by}\ \mathrm{those}\ \mathrm{database}\left(\mathrm{s}\right)} \) |