Table 21.
Scenarios set 2: Rate of complete susceptibility (proportion of isolates categorised as susceptible to each of substances of the harmonised panel)
| Point estimatea | Direction of trendb | Magnitude of trendb | Required sample size |
|---|---|---|---|
| 80% | Increasing | + 10% over 3 successive sampling | 170 |
| 40% | Increasing | + 10% over 3 successive sampling | 200–300 |
| 10% | Increasing | + 10% over 3 successive sampling | 170 |
| 5% | Increasing | + 10% over 3 successive sampling |
a
of occurrence of resistance
b
As antimicrobial susceptibility testing is performed ‘every second year’, a trend is obtained over 3 successive sampling, i.e. over 6 years. Linear trend on the logistic scale is considered.