D'Alfonso A, Patacchiola F, Colagrande I, D'Alessandro G, Di Fonso A, Palermo P, Carta G
Department of Gynecology and Obstetrics, San Salvatore Hospital, L'Aquila, Italy.
ScientificWorldJournal. 2012;2012:162017. doi: 10.1100/2012/162017. Epub 2012 Jun 18.
Multiple factors influence the secondary sex ratio (SSR) including stress, which appears to affect mainly the males born.
We evaluate the effects of the earthquake in L'Aquila on the SSR.
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's test were used for the statistical analysis.
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).
多种因素会影响出生性别比(SSR),包括压力,而压力似乎主要影响出生的男性。
我们评估拉奎拉地震对出生性别比的影响。
将2010年上半年的出生性别比与2008年同期的进行比较。采用卡方检验和费舍尔检验进行统计分析。
地震九个月后,记录到出生性别比显著下降:2010年1月与2008年1月相比,分别为0.62和0.96。当将2010年的前三个月与2008年的前三个月进行比较时,也记录到出生性别比总体下降:分别为0.82和1.11。当将2010年的前三个月与2010年的后三个月进行比较时,出生性别比出现了统计学上的显著增加(分别为0.82和1.27)。