Table 1 |
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Alternative ways to describe populations. |
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| Logical expression |
Meaning |
Differential equations expression |
|
|
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| ~ X~ C |
Population group with neither X nor C |
S |
| X~ C |
Population group with X but not C, i.e. with X only |
X |
| ~ XC |
Population group with C but not X, i.e. with C only |
C |
| ~ X |
Population group without X |
S + C |
| ~ C |
Population group without C |
S + X |
| X |
Total population group with X |
X + XC |
| C |
Total population group with C |
C + XC |
| S |
Susceptible population |
S |
| XC |
Population with both X and C |
XC |
| T |
Total population |
T |
|
|
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|
Lauer et al. Cost Effectiveness and Resource Allocation 2003 1:6 doi:10.1186/1478-7547-1-6 |
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