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. 2020 Oct;11(5):309–318. doi: 10.24171/j.phrp.2020.11.5.07

Table 2.

Estimated levels of “alarm thresholds” of pertussis outbreak at national level in Iran.

Indices Poisson median (range) 95% coverage EWMA*
Overall All ages 7.50 (4.48–11.06) 7.55
≤ 1 5.59 (3.55–8.22) 5.23
> 1 3.90 (2.20–6.36) 3.28

Spring All ages 9.82 (6.87–11.51) 9.36
≤ 1 7.04 (4.93–8.80) 6.22
> 1 4.80 (3.41–6.95) 4.06

Summer All ages 7.01 (4.88–11.84) 6.65
≤ 1 4.50 (3.38–7.14) 3.85
> 1 4.22 (2.95–6.87) 3.39

Autumn All ages 6.49 (5.14–8.37) 5.90
≤ 1 4.68 (3.45–6.47) 3.66
>1 3.51 (1.97–4.97) 2.66

Winter All ages 8.40 (4.17–10.91) 7.24
≤ 1 6.51 (4.14–8.29) 5.66
> 1 3.65 (1.98–5.11) 2.69
*

Exponentially weighted moving average.