Table 1.
Prevalence of asthma symptoms by the video questionnaire survey in junior high school children
*P<0.05, significant difference in the prevalence between 1995 and 2000.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.