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. 2016 Jun 13;71(10):940–949. doi: 10.1136/thoraxjnl-2015-208262

Table 1.

Regimen category codes

RIF containing? # of effective drugs (ED) up to 4m? At 6m RIF protected (Pr6) by another effective drug? Overall (RIF) duration (D) Code
No <3 N/A <6m ED<3 D<6m
No <3 N/A ≥6m ED<3 D≥6m
No ≥3 N/A ≥6m ED≥3 D≥6m
Yes <3 No <6m RIF ED<3 D<6m
Yes <3 No  6m RIF ED<3 D=6m
Yes <3 No >6m RIF ED<3 D>6m
Yes <3 Yes  6m RIF ED<3 Pr6 D=6m
Yes <3 Yes >6m RIF ED<3 Pr6 D>6m
Yes ≥3 No <6m RIF ED≥3 D<6m
Yes ≥3 Yes  6m RIF ED≥3 Pr6 D=6m
Yes ≥3 Yes >6m RIF ED≥3 Pr6 D>6m

Encoded regimen categories (figure 1) present in the main network.

4m, 4 months; 6m, 6 months; D</=/>6m, overall RIF duration or duration of the entire regimen if RIF not present; N/A, not applicable; Pr6, protected at 6 months; RIF, rifampicin.