Use Ki67 Proliferation Index when you need to compute the Ki67 proliferation index as the percentage of Ki67-positive cells. Enter Ki67-positive cells and Total cells using the definitions and units below so the result can be reproduced.

Ki67-positive cells

An integer count or setting greater than or equal to 0.

Total cells

An integer count or setting greater than or equal to 0.

The published tool contract uses this rule: Compute the Ki67 proliferation index as the percentage of Ki67-positive cells.

Ki67 index

The calculated ki67 index in %.

A ratio or percentage can conceal the scale of its numerator and denominator and becomes sensitive to measurement error when the denominator is small.

Retain the original Ki67-positive cells and Total cells values and their units alongside the result. Mitotic Index % is useful when you instead need to calculate the mitotic index as the percentage of counted cells in mitosis. Apoptotic Index provides another view by helping you compute the apoptotic index as the ratio of apoptotic cells to mitotic cells.

• Mitotic Index %

  Calculate the mitotic index as the percentage of counted cells in mitosis.

• Apoptotic Index

  Compute the apoptotic index as the ratio of apoptotic cells to mitotic cells.

• Phase Mitotic Fraction

  Compute the fraction of cells positive for a specific mitotic phase marker.