Socio-demographic characteristics of the analysed sample according to sex and age group.

Note: age-cut-offs to define the younger and older groups were 88 years for males and 91 years for females, as reported in Materials and Methods section.SD: standard deviation.注：用于界定年轻组与老年组的年龄截断阈值为男性88岁、女性91岁，该标准已在《材料与方法》章节中予以说明。SD：标准差（standard deviation）