sentences:  One study showed that the male to female ratio was more than threefold, with statistical relevance (P<0.05) Studies done on the effect of age and XDR-TB have revealed that individuals who are 65 and up are less likely to get XDR-TB.A study in Japan found that XDR-TB patients are more likely to be younger.TB is one of the most common infections in people living with HIV/AIDS.