To identify possible risk factors, prevalence was compared between the pain and no pain groups by using chi-square test, Mann-Whitney U test and t-test, dependent on if the data were nominal, ordinal, interval, or ratio in nature.
To identify possible risk factors, prevalence was compared between the pain and no pain groups by using chi-square test, Mann-Whitney U test and t-test, dependent on if the data were nominal, ordinal, interval, or ratio in nature.