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Survey characteristics
|
|
Date of survey
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30 April–7 May, 2016
|
9 May–17 May, 2016
|
|
Number of households registered
|
2682 (219–453)
|
3006 (208–644)
|
|
Household participation rate1 (%)
|
96.1 (91.4–99.5)
|
92.8 (87.9–95.4)
|
|
Number people registered (all households)
|
10,944 (926–1821)
|
12,307 (935–2542)
|
|
Number people in consenting households (N; %2)
|
10,683; 97.6%
|
11,813; 96.0%
|
|
Proportion present at time of survey3 (%)
|
77.2 (64.9–84.6)
|
74.6% (61.8–82.8)
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Household characteristics
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|
House type
|
|
Temporary (% palm leaf structure)
|
7.0 (2.9–11.3)
|
4.1 (0.0–11.6)
|
|
Semi-permanent (% mud and sticks/stones/coral)
|
24.3 (12.0–50.7)
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26.0 (11.4–40.2)
|
|
Permanent (% brick/stone)
|
68.7 (43.4–84.1)
|
69.9 (48.2–88.6)
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|
Households in proximity to breeding site4 (%)
|
6.8 (1.7–13.6)
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5.8 (0.4–18.4)
|
|
Head of households worried about malaria5 (%)
|
54.0 (44.5–60.3)
|
59.2 (49.8–69.4)
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|
Participant characteristics
|
|
Median age [interquartile range]
|
19 [8–35]
|
19 [8–35]
|
|
Permanent resident of household (%)
|
98.1 (96.8–98.7)
|
98.3 (97.6–99.7)
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|
Percent female (%)
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51.5 (49.5–54.2)
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51.7 (49.8–55.3)
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|
Main occupation6
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Farming (%)
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37.7 (10.7–54.5)
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42.1 (15.4–60.6)
|
|
Fishing (%)
|
12.3 (0.5–33.2)
|
12.7 (0.4–30.8)
|
|
Other (%)
|
27.7 (20.2–36.7)
|
25.5 (11.6–44.0)
|
|
Unemployed (%)
|
24.4 (16.6–30.0)
|
22.9 (15.0–30.2)
|
|
Overnight travel within Zanzibar in last month (%)
|
3.4 (2.1–5.0)
|
2.9 (1.1–4.3)
|
|
Overnight travel outside Zanzibar in last month (%)
|
0.5 (0.0–1.0)
|
0.6 (0.1–1.2)
|
|
Overnight travel outside Zanzibar in last 6 months (%)
|
1.4 (0.4–2.8)
|
1.5 (0.6–2.3)
|
|
Vector control coverage
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|
Households sprayed in the last 12 months (%)
|
84.7 (64.3–94.2)
|
85.1 (77.3–93.8)
|
|
Households with at least one mosquito net (%)
|
85.6 (72.6–97.4)
|
82.3 (72.0–93.4)
|
|
Households with at least one mosquito net per sleeping space (%)
|
67.0 (45.5–81.6)
|
62.6 (54.0–75.3)
|
|
People with access to a bed net7 (%)
|
74.5 (56.6–90.6)
|
71.1 (59.1–80.6)
|
|
People who slept under a mosquito net last night (%)
|
74.6 (53.9–92.0)
|
70.2 (55.8–79.6)
|
|
Children under five who slept under a mosquito net last night (%)
|
79.6 (61.5–96.6)
|
78.8 (62.7–87.4)
|
|
Malaria transmission indicators
|
|
Annual parasite index in 2015 (cases/1000 people)
|
14.4 (11.1–22.4)
|
12.7 (8.3–32.8)
|
|
Malaria prevalence at baseline (%)
|
0.8 (0.0–1.6)
|
2.5 (0.7–4.5)
|
