Basic characteristics of participants according to the number of
live births
Basic characteristics of participants according to the number of live
births are shown in Table 1. Compared with participants with one live
births, both participants with zero and five or more children were more
likely to be non-white with higher levels of Townsend deprivation index,
and a higher percentage of asthma but a lower percentage of use of oral
contraceptive pills. Meanwhile, childless participants were more likely
to have a higher levels of education, and lower levels of BMI and
moderrate activity time, and a lower percentage of current smoking rate
but a higher percentage drinking rate; as well as a lower prevalence of
diabetes, hypertension, emphysema and chronic bronchitis, and history of
stillbirth, spontaneous miscarriage or termination.
Reversely, participants with five or
more children were more likely to have a lower level of education, and
higher levels of BMI and moderrate activity time, and a higher
percentage of current smoking rate but a lower percentage drinking rate,
as well as higher prevalences of diabetes, hypertension, asthma,
emphysema and chronic bronchitis, and history of stillbirth, spontaneous
miscarriage or termination, comparied with correspondings in women
without child. The age at menarche, age at menopause (last menstrual
period), and the length of menstrual cycle are relatively average in
each group, which are nearly 13 years old, 50 years old, and 27 days,
respectively.