TY  - JOUR
PY  - 1991//
TI  - Sunspots and hip fractures
JO  - Chronobiologia
A1  - Caniggia, M.
A1  - Scala, C.
SP  - 1
EP  - 8
VL  - 18
IS  - 1
N2  - In this paper a remarkable statistical link between sunspot cycles and prevalence of hip fractures in the elderly is shown. Hip fractures in old people are due to: 1. increased bone fragility for metabolic bone disease; 2. increased propension to fall. Though it is obvious that a correlation does not imply any causal relationship, reasonable conjectures can be allowed. The hypothesis of an 11-year cyclic variation of ultraviolet radiation as a cause of hip fractures is untenable; one may better assume that solar flares can negatively influence the nervous postural regulation leading to a greater propensity to accidental falls.<p /> <p>Language: en</p>
LA  - en
SN  - 0390-0037
UR  - http://dx.doi.org/
ID  - ref1
ER  -