3.1 | Demographic characteristics of participants
During the 7 years, a total of 457,685 among 475,575 targeted
adolescents completed the survey with a total response rate of 96.2%
(range 95.3-97.2%). Among them, 60,615 participants did not provide
available sleep records. Therefore, their data was considered to be
missing and were excluded. This left a total of 34,067 adolescent with
asthma and 363,003 adolescents without asthma. The overall prevalence
rate of asthma during the entire survey was 8.7% (Table 1). Table 2
shows the general characteristics of the participants and the
differences between subjects with asthma and without. Especially,
adolescents with asthma self-reported unhealthier and unhappier
perceptions, had more stress, higher levels of depression, and more
frequent suicidal ideation and suicidal attempts than did those without
asthma.