From: PopMod: a longitudinal population model with two interacting disease states
Case | π_{XC} calculated as | Comment |
---|---|---|
1 | π_{C}·π_{X} | C and X are independent |
2 | π_{C|X}·π_{X} | C and X interact and π_{C|X} or π_{X|C} is known. |
3 | π_{X|C}·π_{C} | |
4 | π_{C}·π_{X} / [π_{C} + (1 - π_{C}) / RR_{X|C}] | C and X are dependent and the relative risk RR_{X|C} or RR_{C|X} is known. |
5 | π_{X}·π_{C} / [π_{X} + (1 - π_{X}) / RR_{C|X}] | X (C) either potentiates, or protects from, C (X). |
6 | π_{X}·π_{C}·k |