  The coronavirus disease (COVID-19) has spread worldwide with an unprecedented
impact on society. In the Philippines, several interventions such as mobility
restrictions for different age groups and vaccination prioritization programs
have been implemented to reduce the risks of infections and mortality. This
study aimed to identify age-sex composition with greater susceptibility, longer
hospitalization and higher fatality. The COVID-19 cases from March 2020 to
April 2021 provided by the Department of Health Davao Region in the Philippines
were analyzed. A Chi-square test was used to determine the difference in
proportions of COVID-19 cases among age-sex compositions. A correlation plot of
\c{hi}2 test residual was employed to investigate the differences in
susceptibility. Boxplots and Kruskal-Wallis tests were utilized to compare the
length of hospitalizations. The study found a significant difference in the
COVID-19 susceptibility among age-sex compositions (p < 0.01). Male children
and female senior citizens were the most susceptible age-sex compositions.
Furthermore, senior citizens had the longest hospital days wherein the median
and IQR days were 19 (15-27) for men and 18 (16-29) for women. Male senior
citizen was the subgroup with the highest case fatality (21.4%, p < 0.01). It
is recommended that the number of cases among senior citizens be used as an
input in the planning and allocation of medical resources at the provincial and
regional levels. The local government unit executives in the region can also
take advantage of the availability of age-sex composition data in stratifying
localities, planning, allocating COVID-19-related resources and imposing
mobility restrictions.
