A Decrease in Sex Ratio at Birth Nine Months after the Earthquake in L%26apos;Aquila

作者：D' Alfonso A; Patacchiola F; Colagrande I; D' Alessandro G; Di Fonso A; Palermo P; Carta G^*

来源：The Scientific World Journal, 2012, 162017.

DOI：10.1100/2012/162017

Introduction. Multiple factors influence the secondary sex ratio (SSR) including stress, which appears to affect mainly the males born. Objective. We evaluate the effects of the earthquake in L%26apos;Aquila on the SSR. Materials and Methods. The SSR for the first six months of 2010 was compared to that of the same period of 2008. The chi-square test and Fisher%26apos;s test were used for the statistical analysis. Results. Nine months after the earthquake, an important reduction in the SSR was recorded: January 2010 versus January 2008 =0.62 versus 0.96. An overall fall in the SSR was also recorded when the first 3 months of 2010 were compared to the first three months of 2008: 0,82 versus 1,11. When the first three months of 2010 were compared with the second three months of 2010, a statistically significant increase of the sex ratio at birth was noted (0,82 versus 1,27).

• 出版日期2012