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The probability* of the true population value of GAM exceeding the 10% threshold for different counts of GAM cases and different design effects in a 33 × 6 (33 clusters of 6 children) survey. |
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| Observed GAM count |
GAM prevalence |
Probability of GAM exceeding 10% threshold, % |
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|
|
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| DEFF** = 1 |
DEFF** = 1.1 |
DEFF** = 1.2 |
DEFF** = 1.3 |
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|
|
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| 14 |
7.1% |
9.0% |
10.0% |
10.9% |
11.9% |
|
|
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| 15 |
7.6% |
13.2% |
14.3% |
15.4% |
16.3% |
|
|
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| 16 |
8.1% |
18.7% |
19.9% |
20.9% |
21.8% |
|
|
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| 17 |
8.6% |
25.6% |
26.6% |
27.5% |
28.2% |
|
|
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| 18 |
9.1% |
33.6% |
34.4% |
35.0% |
35.5% |
|
|
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| 19 |
9.6% |
42.5% |
42.9% |
43.2% |
43.5% |
|
|
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| 20 |
10.1% |
51.9% |
51.8% |
51.7% |
51.6% |
|
|
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| 21 |
10.6% |
61.0% |
60.6% |
60.2% |
59.8% |
|
|
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| 22 |
11.1% |
69.6% |
68.9% |
68.1% |
67.5% |
|
|
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| 23 |
11.6% |
77.1% |
76.2% |
75.3% |
74.5% |
|
* Based on the one-sided t-test with 32 degrees of freedom ** Design effect | |||||
Bilukha and Blanton Emerging Themes in Epidemiology 2008 5:25 doi:10.1186/1742-7622-5-25 |
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