OR = odd ratio; CI = confidence interval; N/A = not applicable
* The association between the presence of pulmonary function impairment
and FEV1 z-score was not assessed because
FEV1 z-score is one of the determinant factors of
pulmonary function impairment.
Table 3 presents factors that may impact on changes in
pulmonary function measures in spirometry. Although there was a trend
between increasing age and decreasing FEV1 z-score, the
trend did not show a statistically significant correlation. Moreover,
there was no significant correlation between the pulmonary function
measures with other factors, including the history of COVID-19
pneumonia, being overweight or obesity, the presence of post COVID-19
symptoms, and the interval between acute COVID-19 infection and
assessment timepoint.