2.2 Comparison of pulse oscillation parameters in children of
different ages and genders
First compared different age children IOS related parameter values, the
results showed that there was no significant difference in the main
parameters of IOS between the same age and different gender groups, but
there was significant difference among different age groups. The values
of Zrs, Fres, R5 and R20 decreased with
age, while X5 increased with age (Table 2).
2.3 The
relationship between IOS parameters and height, weight, age, and gender
of children
Further compare different height children IOS related parameter values,
it is found that the same height, no obvious difference was found
between different genders IOS parameters, and different height has the
obvious difference (see Figure 1), line further correlation analysis
results show that both boy and girl, with high increase of
Z5, Fres, R5, and R20are dwindling, and negatively correlated with height, and
X5 with the increase of height, increased gradually, and
is closely relative to height (Figure 1 and table 3). Multiple stepwise
regression analysis further proved that although IOS parameters were
related to height, age, and weight, most IOS parameters were most
closely related to height (with the largest R value), followed by age
and weight.
2.4 IOS main parameter prediction equation
By multiple stepwise regression analysis to age (A), height (H), weight
(W) as the independent variables of the equation of R5,
R20, X5, Z5, and Fres of
IOS related parameters as the dependent variable, work out different
gender IOS related parameters of the regression equation (see table 4).