Clinical symptoms or signs in advanced cases of schistosomiasis japonica, stratified by age group (n = 215).

aSignificant difference between age groups for general association (PP>0.05), but with statistically significant difference between the age groups 30–59 years and ≥60 years (PbSignificant difference between age groups for general association (PPcSignificant difference between age groups for general association (PPdSignificant difference between age groups for general association (PP