Figure 4. Increase in relative risk of tuberculosis incidence in adults living with HIV (age ≥15 years) not on antiretroviral therapy by CD4-positive lymphocyte count.

Thick dashed lines represent 95% credible intervals around the point estimate (thick solid line); horizontal lines represent means over depicted CD4 categories; dotted lines represent 95% credible intervals for these category means; the horizontal dashed line represents an incidence rate ratio of 1 (no change). It is assumed that individuals have a CD4 count of 1,000 cells/mm³ at the point of HIV infection.