Table 1 The four models considered for estimating the mode of growth of the cancer cells based on data from monoculture spheroids seeded at a low density of 10,000 cells.

From: Frequency-dependent interactions determine outcome of competition between two breast cancer cell lines

Growth model

Equation

Parameters

Exponential

\(\frac{{{\text{dN}}}}{{{\text{dt}}}} = {\text{rN}}\)

r is the instantaneous per capita growth rate

N is population size

K is the carrying capacity

Logistic

\(\frac{dN}{{dt}} = rN\left( {1 - \frac{N}{K}} \right)\)

Gompertz

\(\frac{dN}{{dt}} = r{\text{N*ln}}\left( \frac{K}{N} \right)\)

Monod

\(\frac{dN}{{dt}} = r\left( {K - N} \right)\)