Table 3.

Net-use environment and washing of cohort nets from campaign

Variable	Unguja	Pemba	p-value for site comparison
Cohort nets	N = 382 % (95% CI)	N = 452 % (95% CI)
Ever found hanging	77.8 (69.8–84.1)	76.3 (67.7–83.2)	0.82
Ever used	77.5 (69.8–83.7)	75.9 (45.9–63.6)	0.73

Cohort nets ever hung	N = 325	N = 372
Tied up or folded when hanging
Never	32.9 (21.6–46.7)	20.7 (15.6–26.9)	0.010
At times	38.2 (30.0–47.0)	28.0 (19.1–38.9)
Always	28.9 (20.3–39.5)	51.3 (38.9–63.7)
Type of sleeping placea
Bed frame (finished)	26.3 (16.5–39.2)	27.8 (16.8–42.4)	0.55
Bed frame (sticks)	54.6 (42.2–66.5)	51.3 (39.5–63.0)
Foam mattress	15.4 (10.9–21.3)	19.4 (15.7–23.7)
Reed mat	3.8 (1.3–10.1)	1.5 (0.5–3.9)

Cohort nets ever used	N = 273	N = 321
Dominant user group
Children only	16.1 (11.6–22.0)	24.9 (19.1–31.8)	0.075
Children with adults	26.7 (20.7–33.8)	26.5 (21.6–32.0)
Adults only	57.1 (51.5–62.6)	48.6 (40.3–57.0)
Ever washed	93.6 (85.6–97.3)	94.5 (90.2–96.9)	0.77

Cohort nets ever washed	N = 296	N = 338
Washes last 6 monthsb
Median (IQR)	2.3 (1.7–3.0)	2.0 (1.5–3.0)	0.001
Use of detergent
Never	0 (–)	1.2 (0.4–3.8)	0.080
At times	10.8 (6.3–18.0)	4.1 (1.4–11.5)
Always	89.2 (82.0–93.7)	94.7 (87.0–98.0)
Drying net outside
Never	0 (–)	4.4 (2.3–8.5)	0.009
At times	5.7 (2.7–11.8)	14.2 (8.4–23.0)
Always	94.3 (88.2–97.3)	81.4 (69.6–89.3)
Drying over bush or fence
Never	93.2 (86.3–97.0)	98.5 (94.9–99.6)	0.033
At times	6.4 (3.1–12.7)	1.5 (0.4–5.1)
Always	0.3 (0.0–2.5)	0 (–)

^aLowest type of sleeping place ever reported for net

^bAverage of all recoded 6 months episodes for each net