> "Twenty years ago the time to Aids was 10 years, but in the last 10 years in Botswana that might have increased to 12.5 years, a sort of incremental change, b

> "Twenty years ago the time to Aids was 10 years, but in the last 10 years in Botswana that might have increased to 12.5 years, a sort of incremental change, but in the big picture that is a rapid change." 20 years ago, the ARV's and mixes weren't what they were 10 years ago and awareness + access to therapy also changed. Therapy initiation guidelines changed - which would directly impact time to AIDS. Throw that statement away in relation to the meaning of the study results - except if this statement is there, it raises a concern about bias or mistakes in the study due to an insufficiently rigorous handling of the data and contexts/meaning.