The objectives of this study were: to examine the prevalence of "restriction of going out due to fear of falling", and to identify which factor was associated independently with "restriction of going out due to fear of falling". A sample (N = 1057) of elderly adults residing in Nanjing, Peo ple's Republic of China was investigated using a questionnaire. 18.7% of respondents acknowl edged they have curtailed "going out" for fear of falling. Female gender, suffering from hyper tension and having lower self-efficacy scores may be correlated independently with "restriction of going out due to fear of falling". These results suggested that "restriction of going out due to fear of falling" is common in Chinese community-dwelling elderly, and it might decrease their quality of life.
The present study examines the Korean sex ratio at birth using Vital Statistics Korea data from 1970 to 1998. Since 1980, in most years, the sex ratio at birth correlated positively with the birth order (p<0.05). The results demonstrate that the ratio has dramatically increased in the past two decades, especially for higher birth orders, with the ratio reaching a maximum of 224.7 and 202.8 in 1994 at the third and fourth birth orders, respectively . Korean society has traditionally held a strong preference for having sons. In the mid-1980s, advanced medical technology for sex predetermination and sex preselection became popular and enabled mothers to try to choose the sex of the baby. The increased sex ratio at birth at higher birth orders is presumably attributed to the technological advances . As a result, the Korean government introduced laws to prohibit using such medical technology . Other factors affecting the recent trends of sex ratio at birth are also discussed, including Korean culture and social trends such as the decline in fertility.
The association of the angiotensin I converting enzyme gene (ACE) insertion-deletion (IID) polymorphism with hypertension and coronary heart disease has been reported. Moreover, the racial difference in genotypic and allelic frequencies of ACE was found. Comparing our data with the results of other references, we investigated the geographic differences in genotypic and al lelic frequencies of ACE I/D polymorphism in Japan. The geographic difference in genotypic and allelic frequencies of ACE was found. This difference among Japanese is interesting from an epidemiological point of view.