Students were divided into two groups on the basis of the exercise time. Using the median
value of exercise time, participants with more than 3 hours of exercise time were
categorized as the high-exercise group, and those with less than 3 hours of exercise time
were categorized as the low-exercise group. The rate of musculoskeletal problems was
compared between the groups using the χ2 test. Multivariate logistic regression
analysis was also performed; the musculoskeletal problem was set as the objective variable
and the exercise time, school year, sex, and mode of going to school were set as
explanatory variables. A p-value < 0.05 indicated statistical significance. All
statistical analyses were performed with JMP Statistics, version 13.2.1 (SAS Institute
Inc.).
value of exercise time, participants with more than 3 hours of exercise time were
categorized as the high-exercise group, and those with less than 3 hours of exercise time
were categorized as the low-exercise group. The rate of musculoskeletal problems was
compared between the groups using the χ2 test. Multivariate logistic regression
analysis was also performed; the musculoskeletal problem was set as the objective variable
and the exercise time, school year, sex, and mode of going to school were set as
explanatory variables. A p-value < 0.05 indicated statistical significance. All
statistical analyses were performed with JMP Statistics, version 13.2.1 (SAS Institute
Inc.).