All Non-linearity is not Chaotic
I enjoyed the paper by Paul Plsek and Trish
with its sweeping overview of the world of medical activity seen from
the perspective of complexity science, however I think the treatment of
linearity was potentially misleading.
All chaotic systems are non linear but not all non linear systems are
chaotic(2). The sensitivity to initial conditions of a system is a
of chaos rather than non-linearity. Most deterministic relationships
in medicine are non linear. For example the dose-response curve for a
non linear but,generally,the effect is not chaotic.
Gerald Partridge M.A, M.R.C.G.P.
Keighley BD21 1SA
1 Plsek P.E,Greenhalgh T. BMJ 2001;323;625-8
2 Hilborn R.C."Chaos and Nonlinear Dynamics" O.U.P. 2000
NB. Competing interest: NONE
Competing interests: No competing interests