Table 1. Characteristics of survey data, matched on location, from the ITI global prevalence database.
| “Treatment” (with MDA) a (n = 170) | “Background” (no MDA) a (n = 112) | |||
|---|---|---|---|---|
| No. | % | No. | % | |
| Countries represented | ||||
| Burkina Faso | 18 | 10.8 | 37 | 33.0 |
| Ethiopia | 25 | 15.0 | 10 | 8.8 |
| Ghana | 23 | 13.8 | 0 | 0.0 |
| Mauritania | 20 | 12.0 | 0 | 0.0 |
| Nigeria | 4 | 2.4 | 50 | 44.6 |
| Vietnam | 25 | 13.2 | 0 | 0.0 |
| Burundi, Guinea, Guinea Bissau, Kenya, Malawi, Mali, Morocco, Mozambique, Nepal, Niger, Sudan, Tanzania, The Gambia | 55 | 32.4 | 15 | 13.4 |
| Baseline TF Prevalence | ||||
| Category 0: <5% | 14 | 8.2 | 14 | 12.5 |
| Category 1: 5–9.9% | 27 | 15.9 | 22 | 19.6 |
| Category 2: 10–29.9% | 96 | 56.5 | 48 | 42.9 |
| Category 3: 30–49.9% | 23 | 13.5 | 26 | 23.2 |
| Category 4: >50% | 10 | 5.9 | 2 | 1.8 |
| Follow-up TF Prevalence | ||||
| Category 0: <5% | 89 | 52.4 | 46 | 41.1 |
| Category 1: 5–9.9% | 30 | 17.7 | 21 | 18.8 |
| Category 2: 10–29.9% | 37 | 21.8 | 36 | 32.1 |
| Category 3: 30–49.9% | 14 | 8.2 | 8 | 7.1 |
| Category 4: >50% | — | — | 1 | 0.9 |
| Years Between Surveys | ||||
| 1–2 years | 25 | 14.7 | 1 | 0.9 |
| 3–4 years | 51 | 30.0 | 13 | 11.6 |
| 5–6 years | 43 | 25.3 | 36 | 32.1 |
| 7–9 years | 35 | 20.6 | 14 | 12.5 |
| >10 years | 16 | 9.4 | 48 | 42.9 |
| Rounds Between Surveys | ||||
| 0 Rounds | — | — | 112 | 100 |
| 1–3 Rounds | 91 | 53.5 | — | — |
| 4–5 Rounds | 36 | 21.2 | — | — |
| >5 Rounds | 18 | 10.6 | — | — |
| Missing b | 25 | 14.7 | ||
| Years Before Start of Treatment c | ||||
| 0 Years | 56 | 32.9 | — | — |
| 1–2 Years | 58 | 34.1 | — | — |
| 3–6 Years | 26 | 15.3 | — | — |
| 7+ Years | 5 | 2.9 | ||
| Missing b | 25 | 14.7 | — | — |
| Years Since Start of Treatment | ||||
| 1–3 Years | 27 | 15.9 | — | — |
| 4–5 Years | 80 | 47.1 | — | — |
| 6+ Years | 38 | 22.4 | — | — |
| Missing b | 25 | 14.7 | — | — |
| Coverage Data | ||||
| Any data, 2010–2012 | 52 | 28.4 | — | — |
| Missing | 131 | 71.6 | — | — |
aPairs were sorted into the "treatment" dataset if any MDA had occurred in the interval between them.
b41 pairs in the treatment dataset were missing data on when treatment occurred.
cThese values represent the time interval between the baseline survey and the actual start of treatment.