Fig. 5.

A decision tree to predict how activities (red) could influence pathways to dedicated TB screening. Starting with a group of people with and without TB symptoms, which represents a target group for screening, e.g. a whole population or TB contacts, this decision tree depicts how intervention activities (red text) could influence the group of people accessing TB screening. With an open invitation to a target group regardless of symptoms, the group accessing care (blue boxes) may consist of people with and without TB symptoms irrespective of whether they perceive themselves to have a health problem and irrespective of whether they seek care; however, TB health promotion may increase the proportion of people with TB symptoms within the group accessing care. By offering TB screening personally to people at their home, work or school, access barriers are bypassed (orange boxes)